{"id":8465,"date":"2026-08-18T15:44:13","date_gmt":"2026-08-18T15:44:13","guid":{"rendered":"https:\/\/www.englishtestcenter.com\/?p=8465"},"modified":"2026-08-18T16:49:21","modified_gmt":"2026-08-18T16:49:21","slug":"modal-verbs-can-could-may-might-must-should","status":"publish","type":"post","link":"https:\/\/www.englishtestcenter.com\/index.php\/modal-verbs-can-could-may-might-must-should\/","title":{"rendered":"Modal Verbs: Can, Could, May, Might, Must &#038; Should"},"content":{"rendered":"<article class=\"grammar-guide\"><strong>Modal verbs<\/strong> are special auxiliary verbs used to express ideas<br \/>\nsuch as ability, possibility, permission, obligation, necessity, advice,<br \/>\ncertainty, and probability.Some of the most common English modal verbs are<br \/>\n<strong>can, could, may, might, must, and should<\/strong>.<br \/>\nUnderstanding the differences between these modal verbs will help you communicate<br \/>\nmore naturally and accurately in everyday English, academic writing, and exams.<\/p>\n<p>In this lesson, you will learn the rules, structures, meanings, differences,<br \/>\nexamples, common mistakes, and typical uses of the most important English modal verbs.<br \/>\nAt the end, you can practice with exercises and a short grammar quiz.<\/p>\n<h2>What Are Modal Verbs?<\/h2>\n<p>Modal verbs are auxiliary verbs that come before the main verb.<br \/>\nThey add meanings such as possibility, ability, advice, permission,<br \/>\nor obligation.<\/p>\n<p><strong>Basic structure:<\/strong><\/p>\n<p><strong>Subject + modal verb + base verb<\/strong><\/p>\n<ul>\n<li>I <strong>can swim<\/strong>.<\/li>\n<li>She <strong>might come<\/strong>.<\/li>\n<li>You <strong>should study<\/strong>.<\/li>\n<li>They <strong>must leave<\/strong>.<\/li>\n<\/ul>\n<h2>Important Modal Verb Rule<\/h2>\n<p>After most modal verbs, we use the<br \/>\n<strong>base form of the verb without \u201cto\u201d<\/strong>.<\/p>\n<p>&#x2705; She can swim.<\/p>\n<p>&#x274c; She can to swim.<\/p>\n<p>&#x2705; You should study.<\/p>\n<p>&#x274c; You should to study.<\/p>\n<p>The main modal verbs also do not change according to the subject.<\/p>\n<ul>\n<li>I can swim.<\/li>\n<li>He can swim.<\/li>\n<li>She can swim.<\/li>\n<li>They can swim.<\/li>\n<\/ul>\n<p>We do not add <strong>-s<\/strong> after a modal verb.<\/p>\n<p>&#x274c; He cans swim.<\/p>\n<p>&#x2705; He can swim.<\/p>\n<h2>Main English Modal Verbs<\/h2>\n<ul>\n<li><strong>Can:<\/strong> ability, permission, possibility<\/li>\n<li><strong>Could:<\/strong> past ability, polite requests, possibility<\/li>\n<li><strong>May:<\/strong> permission and possibility<\/li>\n<li><strong>Might:<\/strong> weaker possibility<\/li>\n<li><strong>Must:<\/strong> strong obligation, necessity, deduction<\/li>\n<li><strong>Should:<\/strong> advice, recommendation, expectation<\/li>\n<\/ul>\n<h2>Can<\/h2>\n<p><strong>Can<\/strong> is one of the most common modal verbs in English.<br \/>\nIt is mainly used for ability, permission, and possibility.<\/p>\n<h3>1. Ability<\/h3>\n<ul>\n<li>I can swim.<\/li>\n<li>She can speak three languages.<\/li>\n<li>He can drive a truck.<\/li>\n<li>They can play the piano.<\/li>\n<\/ul>\n<h3>2. Permission<\/h3>\n<ul>\n<li>Can I use your phone?<\/li>\n<li>Can we leave early?<\/li>\n<li>You can sit here.<\/li>\n<\/ul>\n<h3>3. Requests<\/h3>\n<ul>\n<li>Can you help me?<\/li>\n<li>Can you open the window?<\/li>\n<li>Can you send me the document?<\/li>\n<\/ul>\n<h3>4. General Possibility<\/h3>\n<ul>\n<li>Driving in winter can be dangerous.<\/li>\n<li>This job can be stressful.<\/li>\n<li>English grammar can be difficult at first.<\/li>\n<\/ul>\n<h2>Cannot and Can&#8217;t<\/h2>\n<p>The negative form of <strong>can<\/strong> is<br \/>\n<strong>cannot<\/strong> or <strong>can&#8217;t<\/strong>.<\/p>\n<ul>\n<li>I can&#8217;t swim.<\/li>\n<li>She cannot come today.<\/li>\n<li>We can&#8217;t park here.<\/li>\n<\/ul>\n<h2>Could<\/h2>\n<p><strong>Could<\/strong> has several important uses.<br \/>\nIt can describe past ability, polite requests, suggestions,<br \/>\nand possibility.<\/p>\n<h3>1. Past Ability<\/h3>\n<ul>\n<li>I could swim when I was five.<\/li>\n<li>She could speak French when she was younger.<\/li>\n<li>He could run very fast as a child.<\/li>\n<\/ul>\n<h3>2. Polite Requests<\/h3>\n<p><strong>Could<\/strong> is often more polite than <strong>can<\/strong>.<\/p>\n<ul>\n<li>Could you help me?<\/li>\n<li>Could you open the door, please?<\/li>\n<li>Could you explain this question?<\/li>\n<\/ul>\n<h3>3. Possibility<\/h3>\n<ul>\n<li>It could rain later.<\/li>\n<li>That could be the answer.<\/li>\n<li>They could arrive tonight.<\/li>\n<\/ul>\n<h3>4. Suggestions<\/h3>\n<ul>\n<li>We could go to the cinema tonight.<\/li>\n<li>You could try restarting the computer.<\/li>\n<li>They could take the train instead.<\/li>\n<\/ul>\n<h2>Can vs Could<\/h2>\n<p>Both <strong>can<\/strong> and <strong>could<\/strong> can express ability,<br \/>\nbut they usually refer to different times.<\/p>\n<p><strong>Present ability:<\/strong><br \/>\nI can swim.<\/p>\n<p><strong>Past ability:<\/strong><br \/>\nI could swim when I was five.<\/p>\n<p>For requests, <strong>could<\/strong> generally sounds more polite.<\/p>\n<p><strong>Can you help me?<\/strong><\/p>\n<p><strong>Could you help me?<\/strong><\/p>\n<p>Both are correct, but the second is usually more polite.<\/p>\n<h2>May<\/h2>\n<p><strong>May<\/strong> is commonly used for possibility<br \/>\nand formal permission.<\/p>\n<h3>1. Possibility<\/h3>\n<ul>\n<li>It may rain tomorrow.<\/li>\n<li>She may come to the meeting.<\/li>\n<li>The train may be late.<\/li>\n<li>Prices may increase next year.<\/li>\n<\/ul>\n<h3>2. Formal Permission<\/h3>\n<ul>\n<li>May I come in?<\/li>\n<li>May I ask a question?<\/li>\n<li>May I use your phone?<\/li>\n<\/ul>\n<p><strong>May I&#8230;?<\/strong> is generally more formal than<br \/>\n<strong>Can I&#8230;?<\/strong><\/p>\n<h2>Might<\/h2>\n<p><strong>Might<\/strong> is mainly used to express possibility,<br \/>\nespecially when the speaker is uncertain.<\/p>\n<ul>\n<li>It might rain tonight.<\/li>\n<li>She might come later.<\/li>\n<li>They might cancel the meeting.<\/li>\n<li>I might buy a new laptop next month.<\/li>\n<\/ul>\n<h2>May vs Might<\/h2>\n<p>Both <strong>may<\/strong> and <strong>might<\/strong> can express possibility.<br \/>\nIn many situations, both are possible.<\/p>\n<p><strong>It may rain later.<\/strong><\/p>\n<p><strong>It might rain later.<\/strong><\/p>\n<p>In everyday English, <strong>might<\/strong> can sometimes suggest<br \/>\nslightly more uncertainty, although the difference is often small.<\/p>\n<h2>Can vs May for Permission<\/h2>\n<p>Both forms can be used when asking for permission.<\/p>\n<p><strong>Can I leave early?<\/strong><\/p>\n<p>This is common and natural in everyday English.<\/p>\n<p><strong>May I leave early?<\/strong><\/p>\n<p>This sounds more formal.<\/p>\n<h2>Must<\/h2>\n<p><strong>Must<\/strong> is mainly used for strong obligation,<br \/>\nnecessity, and logical conclusions.<\/p>\n<h3>1. Strong Obligation<\/h3>\n<ul>\n<li>You must wear a seat belt.<\/li>\n<li>Students must submit the assignment by Friday.<\/li>\n<li>You must follow the safety rules.<\/li>\n<li>Employees must wear identification cards.<\/li>\n<\/ul>\n<h3>2. Strong Personal Necessity<\/h3>\n<ul>\n<li>I must remember to call her.<\/li>\n<li>I must finish this report today.<\/li>\n<li>We must leave soon.<\/li>\n<\/ul>\n<h3>3. Logical Deduction<\/h3>\n<p>We can use <strong>must<\/strong> when we are almost certain<br \/>\nsomething is true based on evidence.<\/p>\n<p><strong>The lights are on. Someone must be home.<\/strong><\/p>\n<p><strong>She studied all night. She must be tired.<\/strong><\/p>\n<p><strong>He&#8217;s wearing a uniform. He must work here.<\/strong><\/p>\n<h2>Must Not vs Don&#8217;t Have To<\/h2>\n<p>This is an important distinction.<\/p>\n<h3>Must Not \/ Mustn&#8217;t<\/h3>\n<p><strong>Mustn&#8217;t<\/strong> means something is prohibited.<\/p>\n<ul>\n<li>You mustn&#8217;t smoke here.<\/li>\n<li>You mustn&#8217;t touch that machine.<\/li>\n<li>Students mustn&#8217;t use phones during the exam.<\/li>\n<\/ul>\n<h3>Don&#8217;t Have To<\/h3>\n<p><strong>Don&#8217;t have to<\/strong> means something is not necessary.<\/p>\n<ul>\n<li>You don&#8217;t have to come tomorrow.<\/li>\n<li>We don&#8217;t have to wear uniforms.<\/li>\n<li>She doesn&#8217;t have to work today.<\/li>\n<\/ul>\n<p><strong>Compare:<\/strong><\/p>\n<p><strong>You mustn&#8217;t park here.<\/strong><br \/>\nParking is prohibited.<\/p>\n<p><strong>You don&#8217;t have to park here.<\/strong><br \/>\nThere is no necessity to park here.<\/p>\n<h2>Must vs Have To<\/h2>\n<p>Both <strong>must<\/strong> and <strong>have to<\/strong><br \/>\ncan express obligation.<\/p>\n<p><strong>You must finish the report.<\/strong><\/p>\n<p><strong>You have to finish the report.<\/strong><\/p>\n<p>In many situations, the meaning is similar.<br \/>\nHowever, <strong>must<\/strong> often sounds like a strong rule,<br \/>\ninstruction, or personal necessity, while <strong>have to<\/strong><br \/>\nis commonly used for external rules or circumstances.<\/p>\n<h3>Examples<\/h3>\n<ul>\n<li>I must remember to call my mother.<\/li>\n<li>I have to wear a uniform at work.<\/li>\n<li>You must be careful.<\/li>\n<li>Employees have to arrive before 9 a.m.<\/li>\n<\/ul>\n<h2>Should<\/h2>\n<p><strong>Should<\/strong> is mainly used for advice,<br \/>\nrecommendations, expectations, and mild obligation.<\/p>\n<h3>1. Advice<\/h3>\n<ul>\n<li>You should study more.<\/li>\n<li>You should see a doctor.<\/li>\n<li>She should get more sleep.<\/li>\n<li>They should leave early.<\/li>\n<\/ul>\n<h3>2. Recommendations<\/h3>\n<ul>\n<li>You should visit London.<\/li>\n<li>You should try this restaurant.<\/li>\n<li>We should take the train.<\/li>\n<\/ul>\n<h3>3. Expectation<\/h3>\n<p><strong>Should<\/strong> can show that we expect something to happen.<\/p>\n<ul>\n<li>The train should arrive soon.<\/li>\n<li>She should be home by 7 p.m.<\/li>\n<li>The package should arrive tomorrow.<\/li>\n<\/ul>\n<h2>Should Not \/ Shouldn&#8217;t<\/h2>\n<p><strong>Shouldn&#8217;t<\/strong> is used to give negative advice.<\/p>\n<ul>\n<li>You shouldn&#8217;t smoke.<\/li>\n<li>You shouldn&#8217;t drive so fast.<\/li>\n<li>He shouldn&#8217;t stay up so late.<\/li>\n<li>They shouldn&#8217;t spend so much money.<\/li>\n<\/ul>\n<h2>Must vs Should<\/h2>\n<p>The main difference is the strength of the obligation or advice.<\/p>\n<h3>Must = Strong Obligation<\/h3>\n<p><strong>You must wear a helmet.<\/strong><\/p>\n<p>This sounds like a rule or strong requirement.<\/p>\n<h3>Should = Advice<\/h3>\n<p><strong>You should wear a helmet.<\/strong><\/p>\n<p>This sounds like a recommendation.<\/p>\n<h2>Must vs Should Examples<\/h2>\n<ul>\n<li>You must show your passport at immigration.<\/li>\n<li>You should arrive at the airport early.<\/li>\n<li>Students must follow the exam rules.<\/li>\n<li>Students should revise before the exam.<\/li>\n<\/ul>\n<h2>Modals of Possibility<\/h2>\n<p>Several modal verbs can express different levels of possibility.<\/p>\n<ul>\n<li><strong>may:<\/strong> possible<\/li>\n<li><strong>might:<\/strong> possible, often slightly less certain<\/li>\n<li><strong>could:<\/strong> possible<\/li>\n<\/ul>\n<p><strong>Examples:<\/strong><\/p>\n<ul>\n<li>She may come tonight.<\/li>\n<li>She might come tonight.<\/li>\n<li>She could come tonight.<\/li>\n<\/ul>\n<p>All three sentences suggest that her arrival is possible,<br \/>\nbut not certain.<\/p>\n<h2>Modals of Deduction<\/h2>\n<p>Modal verbs can also show how certain we are about a situation.<\/p>\n<h3>Must = Strong Certainty<\/h3>\n<p><strong>He has been working for twelve hours. He must be exhausted.<\/strong><\/p>\n<h3>Might \/ May \/ Could = Possibility<\/h3>\n<p><strong>She might be at work.<\/strong><\/p>\n<p><strong>She may be at work.<\/strong><\/p>\n<p><strong>She could be at work.<\/strong><\/p>\n<h3>Can&#8217;t = Strong Impossibility<\/h3>\n<p><strong>He can&#8217;t be at home. I just saw him at the office.<\/strong><\/p>\n<h2>Modal Verbs in Negative Sentences<\/h2>\n<ul>\n<li>can \u2192 cannot \/ can&#8217;t<\/li>\n<li>could \u2192 could not \/ couldn&#8217;t<\/li>\n<li>may \u2192 may not<\/li>\n<li>might \u2192 might not<\/li>\n<li>must \u2192 must not \/ mustn&#8217;t<\/li>\n<li>should \u2192 should not \/ shouldn&#8217;t<\/li>\n<\/ul>\n<p><strong>Examples:<\/strong><\/p>\n<ul>\n<li>I can&#8217;t drive.<\/li>\n<li>She couldn&#8217;t come yesterday.<\/li>\n<li>It may not rain.<\/li>\n<li>They might not attend.<\/li>\n<li>You mustn&#8217;t enter this room.<\/li>\n<li>You shouldn&#8217;t worry.<\/li>\n<\/ul>\n<h2>Questions with Modal Verbs<\/h2>\n<p>To form questions, put the modal verb before the subject.<\/p>\n<p><strong>Modal + Subject + Base Verb?<\/strong><\/p>\n<ul>\n<li>Can you swim?<\/li>\n<li>Could you help me?<\/li>\n<li>May I come in?<\/li>\n<li>Should we leave now?<\/li>\n<\/ul>\n<p>We do not normally use <strong>do<\/strong> or <strong>does<\/strong><br \/>\nwith modal verbs.<\/p>\n<p>&#x274c; Do you can swim?<\/p>\n<p>&#x2705; Can you swim?<\/p>\n<h2>Modal Verbs Quick Comparison<\/h2>\n<table>\n<thead>\n<tr>\n<th>Modal<\/th>\n<th>Main Use<\/th>\n<th>Example<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Can<\/td>\n<td>Ability \/ Permission<\/td>\n<td>I can swim.<\/td>\n<\/tr>\n<tr>\n<td>Could<\/td>\n<td>Past Ability \/ Polite Request<\/td>\n<td>Could you help me?<\/td>\n<\/tr>\n<tr>\n<td>May<\/td>\n<td>Possibility \/ Formal Permission<\/td>\n<td>It may rain.<\/td>\n<\/tr>\n<tr>\n<td>Might<\/td>\n<td>Possibility<\/td>\n<td>She might come.<\/td>\n<\/tr>\n<tr>\n<td>Must<\/td>\n<td>Strong Obligation \/ Deduction<\/td>\n<td>You must wear a seat belt.<\/td>\n<\/tr>\n<tr>\n<td>Should<\/td>\n<td>Advice \/ Recommendation<\/td>\n<td>You should rest.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Common Modal Verb Mistakes<\/h2>\n<h3>Mistake 1: Using \u201cTo\u201d After a Modal<\/h3>\n<p>&#x274c; I can to swim.<\/p>\n<p>&#x2705; I can swim.<\/p>\n<h3>Mistake 2: Adding -s with He or She<\/h3>\n<p>&#x274c; She cans drive.<\/p>\n<p>&#x2705; She can drive.<\/p>\n<h3>Mistake 3: Using Do or Does in Questions<\/h3>\n<p>&#x274c; Do you can help me?<\/p>\n<p>&#x2705; Can you help me?<\/p>\n<h3>Mistake 4: Using the Wrong Negative Meaning<\/h3>\n<p>&#x274c; You mustn&#8217;t come tomorrow if you don&#8217;t want to.<\/p>\n<p>If attendance is optional, say:<\/p>\n<p>&#x2705; You don&#8217;t have to come tomorrow.<\/p>\n<h3>Mistake 5: Confusing Must and Should<\/h3>\n<p><strong>You must see a doctor.<\/strong><\/p>\n<p>This sounds like a strong necessity.<\/p>\n<p><strong>You should see a doctor.<\/strong><\/p>\n<p>This gives advice.<\/p>\n<h3>Mistake 6: Using a Past Verb After a Modal<\/h3>\n<p>&#x274c; She can went home.<\/p>\n<p>&#x2705; She can go home.<\/p>\n<h2>Modal Verb Examples<\/h2>\n<ul>\n<li>I can speak English.<\/li>\n<li>Could you help me with this question?<\/li>\n<li>It may rain tomorrow.<\/li>\n<li>She might arrive late.<\/li>\n<li>You must wear a seat belt.<\/li>\n<li>You should drink more water.<\/li>\n<li>We can&#8217;t park here.<\/li>\n<li>They couldn&#8217;t attend the meeting.<\/li>\n<li>Students mustn&#8217;t use phones during the test.<\/li>\n<li>You shouldn&#8217;t stay up so late.<\/li>\n<li>He must be tired after working all day.<\/li>\n<li>She might be at home.<\/li>\n<\/ul>\n<h2>Modal Verbs Worksheet<\/h2>\n<p>Choose the most appropriate modal verb:<br \/>\n<strong>can, could, may, might, must, or should<\/strong>.<\/p>\n<ol>\n<li>You ________ wear a seat belt while driving.<\/li>\n<li>When I was six, I ________ swim very well.<\/li>\n<li>________ you help me with this bag, please?<\/li>\n<li>It ________ rain later, so take an umbrella.<\/li>\n<li>You look tired. You ________ get some rest.<\/li>\n<li>She speaks four languages. She ________ speak French very well.<\/li>\n<li>Students ________ use their phones during the exam.<\/li>\n<li>________ I ask you a question?<\/li>\n<li>The lights are on. Someone ________ be inside.<\/li>\n<li>We ________ go to the cinema tonight, but we haven&#8217;t decided yet.<\/li>\n<\/ol>\n<details>\n<summary><strong>Show Worksheet Answers<\/strong><\/summary>\n<ol>\n<li>must<\/li>\n<li>could<\/li>\n<li>Could \/ Can<\/li>\n<li>may \/ might \/ could<\/li>\n<li>should<\/li>\n<li>can<\/li>\n<li>mustn&#8217;t<\/li>\n<li>May \/ Can<\/li>\n<li>must<\/li>\n<li>might \/ may \/ could<\/li>\n<\/ol>\n<\/details>\n<h2>Modal Verbs Mini Quiz<\/h2>\n<h3>1. She _____ speak three languages.<\/h3>\n<p>A) can<br \/>\nB) cans<br \/>\nC) can to<\/p>\n<h3>2. When I was a child, I _____ run very fast.<\/h3>\n<p>A) can<br \/>\nB) could<br \/>\nC) should<\/p>\n<h3>3. You have a high fever. You _____ see a doctor.<\/h3>\n<p>A) should<br \/>\nB) might<br \/>\nC) can be<\/p>\n<h3>4. Students _____ cheat in an exam.<\/h3>\n<p>A) don&#8217;t have to<br \/>\nB) mustn&#8217;t<br \/>\nC) might<\/p>\n<h3>5. \u201cMay I come in?\u201d expresses:<\/h3>\n<p>A) ability<br \/>\nB) permission<br \/>\nC) past ability<\/p>\n<h3>6. The lights are on. They _____ be at home.<\/h3>\n<p>A) must<br \/>\nB) shouldn&#8217;t<br \/>\nC) couldn&#8217;t<\/p>\n<h3>7. Which sentence is correct?<\/h3>\n<p>A) She can to drive.<br \/>\nB) She cans drive.<br \/>\nC) She can drive.<\/p>\n<h3>8. \u201cYou don&#8217;t have to come tomorrow\u201d means:<\/h3>\n<p>A) Coming is prohibited.<br \/>\nB) Coming is not necessary.<br \/>\nC) You must come.<\/p>\n<h3>9. Which modal is commonly used for advice?<\/h3>\n<p>A) should<br \/>\nB) may<br \/>\nC) can<\/p>\n<h3>10. \u201cIt might rain tonight\u201d expresses:<\/h3>\n<p>A) certainty<br \/>\nB) possibility<br \/>\nC) obligation<\/p>\n<details>\n<summary><strong>Show Quiz Answers<\/strong><\/summary>\n<ol>\n<li><strong>A) can<\/strong><\/li>\n<li><strong>B) could<\/strong><\/li>\n<li><strong>A) should<\/strong><\/li>\n<li><strong>B) mustn&#8217;t<\/strong><\/li>\n<li><strong>B) permission<\/strong><\/li>\n<li><strong>A) must<\/strong><\/li>\n<li><strong>C) She can drive.<\/strong><\/li>\n<li><strong>B) Coming is not necessary.<\/strong><\/li>\n<li><strong>A) should<\/strong><\/li>\n<li><strong>B) possibility<\/strong><\/li>\n<\/ol>\n<\/details>\n<h2>Modal Verbs Summary<\/h2>\n<p>Modal verbs help us express ability, possibility, permission,<br \/>\nobligation, advice, and certainty.<\/p>\n<ul>\n<li><strong>Can:<\/strong> ability and permission<\/li>\n<li><strong>Could:<\/strong> past ability and polite requests<\/li>\n<li><strong>May:<\/strong> possibility and formal permission<\/li>\n<li><strong>Might:<\/strong> possibility and uncertainty<\/li>\n<li><strong>Must:<\/strong> strong obligation and deduction<\/li>\n<li><strong>Should:<\/strong> advice and recommendation<\/li>\n<\/ul>\n<p>Remember the basic rule:<\/p>\n<p><strong>Modal verb + base form of the main verb<\/strong><\/p>\n<p>&#x2705; She can speak English.<\/p>\n<p>&#x2705; You should study.<\/p>\n<p>&#x2705; They might come later.<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<h3>What are modal verbs in English?<\/h3>\n<p>Modal verbs are auxiliary verbs that express meanings such as<br \/>\nability, permission, possibility, obligation, advice, and certainty.<\/p>\n<h3>What are the most common modal verbs?<\/h3>\n<p>Common modal verbs include<br \/>\n<strong>can, could, may, might, must, should, will, would, and shall<\/strong>.<\/p>\n<h3>Do we use \u201cto\u201d after modal verbs?<\/h3>\n<p>Normally, no. Use the base verb directly after the modal.<\/p>\n<p>&#x2705; She can swim.<\/p>\n<p>&#x274c; She can to swim.<\/p>\n<h3>What is the difference between can and could?<\/h3>\n<p><strong>Can<\/strong> commonly expresses present ability,<br \/>\nwhile <strong>could<\/strong> can express past ability,<br \/>\npossibility, or a more polite request.<\/p>\n<h3>What is the difference between may and might?<\/h3>\n<p>Both express possibility. <strong>Might<\/strong> can sometimes suggest<br \/>\na slightly lower level of certainty, although they are often interchangeable.<\/p>\n<h3>What is the difference between must and should?<\/h3>\n<p><strong>Must<\/strong> expresses strong obligation or necessity,<br \/>\nwhile <strong>should<\/strong> usually expresses advice or recommendation.<\/p>\n<h3>What is the difference between mustn&#8217;t and don&#8217;t have to?<\/h3>\n<p><strong>Mustn&#8217;t<\/strong> means something is prohibited.<br \/>\n<strong>Don&#8217;t have to<\/strong> means something is not necessary.<\/p>\n<h2>Continue Practicing English Grammar<\/h2>\n<p>Improve your knowledge of modal verbs with these related<br \/>\nEnglish Test Center tests and grammar exercises:<\/p>\n<ul>\n<li><a href=\"https:\/\/www.englishtestcenter.com\/index.php\/modal-verbs-must-have-to-should-b1-grammar-test\/\"><br \/>\nModal Verbs: Must \/ Have To \/ Should \u2013 B1 Grammar Test<br \/>\n<\/a><\/li>\n<li><a href=\"https:\/\/www.englishtestcenter.com\/index.php\/modals-should-must-have-to-might-b1-grammar-test\/\"><br \/>\nModals: Should \/ Must \/ Have To \/ Might \u2013 B1 Grammar Test<br \/>\n<\/a><\/li>\n<li><a href=\"https:\/\/www.englishtestcenter.com\/index.php\/modals-of-deduction-speculation-b2-grammar-test\/\"><br \/>\nModals of Deduction &amp; Speculation \u2013 B2 Grammar Test<br \/>\n<\/a><\/li>\n<li><a href=\"https:\/\/www.englishtestcenter.com\/index.php\/advanced-modals-c1-grammar-test\/\"><br \/>\nAdvanced Modals \u2013 C1 Grammar Test<br \/>\n<\/a><\/li>\n<li><a href=\"https:\/\/www.englishtestcenter.com\/index.php\/conditionals-zero-first-second-third-rules-examples-quiz\/\"><br \/>\nConditionals: Zero, First, Second &amp; Third<br \/>\n<\/a><\/li>\n<li><a href=\"https:\/\/www.englishtestcenter.com\/index.php\/grammar-worksheets\/\"><br \/>\nBrowse All English Grammar Worksheets<br \/>\n<\/a><\/li>\n<li><a href=\"https:\/\/www.englishtestcenter.com\/index.php\/grammar-exercises\/\"><br \/>\nEnglish Grammar Exercises<br \/>\n<\/a><\/li>\n<\/ul>\n<p>Keep practicing with <strong>English Test Center<\/strong> to improve your grammar,<br \/>\nunderstand modal verbs, and build confidence in everyday,<br \/>\nacademic, IELTS, TOEFL, and YDS English.<\/p>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>Modal verbs are special auxiliary verbs used to express ideas such as ability, possibility, permission, obligation, necessity, advice, certainty, and 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