A1 Linking Words Grammar Test 1 – Form (And, But, Because, So, When, While) | IELTS TOEFL YDS
Learn A1 linking words and correct sentence form with and, but, because, so, when, and while in academic-style sentences. Ideal for IELTS, TOEFL, and YDS preparation with detailed explanations.
Choose the best connector (A, B, or C).
Form reminders:
because introduces the reason/cause
so introduces the result/effect
and joins similar ideas (addition)
but shows contrast
when = at the time that / after / at the moment (time link)
while = during the same time; sometimes contrast (A1-friendly)
RESULTS
#1. The lecture is short, ___ it is very informative.
#2. I studied late, ___ I was tired the next day.
#3. She joined the course ___ she wants to improve her English.
#4. The experiment failed, ___ we repeated it with new data.
#5. I opened the window ___ the room was too hot.
#6. He reads academic articles, ___ he takes notes carefully.
#7. We can start now, ___ we can wait for the instructor.
#8. ___ I finish work, I go to the library.
#9. She doesn’t drink coffee, ___ she drinks tea.
#10. I was listening to the lecture ___ I was writing notes.
#11. The report is long, ___ it is easy to follow.
#12. I missed the bus, ___ I arrived late.
#13. He is new to the lab, ___ he asks many questions.
#14. I stayed home ___ it was raining heavily.
#15. She studied hard, ___ she passed the exam.
🧠 VERY DETAILED EXPLANATIONS (ALL 15)
1) but ✅
Structural reason: but links two clauses with contrast: “short” vs “very informative.”
Meaning logic: Short lectures are often less informative, so this is a surprising contrast.
Rhetorical effect: Academic evaluation with a “surprise value” contrast (IELTS reading tone).
Why wrong answers fail:
because would give a reason (short because informative) — wrong cause logic.
so gives a result (short → informative) — not logical.
Keyword embed: This is A1 linking words practice using and but because so when while with correct form.
2) so ✅
Structural reason: so introduces the result/effect: studied late → tired next day.
Meaning logic: Late study causes tiredness.
Rhetorical effect: Clear cause–effect sentence common in TOEFL dialogues.
Why wrong answers fail:
because would reverse the logic (tired because studied late) but the clause order here is result second, so so fits better.
while indicates simultaneous actions, not result.
Keyword embed: Tests because vs so grammar and cause and effect because so.
3) because ✅
Structural reason: because introduces a reason clause.
Meaning logic: The motivation for joining is to improve English.
Rhetorical effect: Academic intention statement.
Why wrong answers fail:
when is time, not reason.
but is contrast.
Keyword embed: Core basic connectors A1 and IELTS A1 linking words.
4) so ✅
Structural reason: Failure → action taken as a result: repeated the experiment.
Meaning logic: You repeat because it failed; that repetition is the result.
Rhetorical effect: Scientific process logic (very TOEFL/IELTS academic).
Why wrong answers fail:
because would wrongly suggest “failed because we repeated.”
when suggests time sequence, but the meaning is mainly result, not just time.
Keyword embed: cause and effect because so in academic context.
5) because ✅
Structural reason: Window opened because the room was hot (reason).
Meaning logic: Heat is the cause; opening window is response.
Rhetorical effect: Everyday cause–effect, good A1 foundation.
Why wrong answers fail:
while indicates “during the time,” not reason.
but indicates contrast.
Keyword embed: Reinforces because vs so grammar.
6) and ✅
Structural reason: and joins two related actions: reads + takes notes.
Meaning logic: These are complementary academic habits.
Rhetorical effect: Smooth list-like academic routine sentence.
Why wrong answers fail:
so would wrongly imply reads → therefore takes notes (possible but the sentence feels like addition, not consequence).
when would suggest time, not addition.
Keyword embed: sentence connectors form with A1 linking words.
7) but ✅
Structural reason: but shows contrast between two alternatives: start now vs wait.
Meaning logic: These are opposing choices.
Rhetorical effect: Decision-making contrast (TOEFL campus conversation).
Why wrong answers fail:
and suggests both happen together, but here it’s an either/or choice.
because needs a reason clause.
Keyword embed: YDS linking words questions often test this “choice contrast” form.
8) When ✅
Structural reason: When + present simple, present simple is fine for routine time sequence: When I finish work, I go…
Meaning logic: Finish work first, then go library.
Rhetorical effect: Daily schedule sentence (IELTS speaking).
Why wrong answers fail:
While would mean “during finishing work,” which is not logical.
Because would make it a reason, not a time condition.
Keyword embed: Tests when vs while A1.
9) but ✅
Structural reason: Contrast of preferences: not coffee, yes tea.
Meaning logic: Tea replaces coffee, showing contrast.
Rhetorical effect: Simple contrast used in many exam dialogues.
Why wrong answers fail:
because would need a reason (She doesn’t drink coffee because she drinks tea = not logical).
so would imply not coffee → result tea (not strict cause-effect).
Keyword embed: and but because so when while core set.
10) while ✅
Structural reason: while connects two actions happening at the same time: listening and writing notes.
Meaning logic: Both actions overlap.
Rhetorical effect: Academic study behavior description.
Why wrong answers fail:
when can mark a point in time, but here we want “during,” so while is better.
because is reason.
Keyword embed: Direct when vs while A1 form test.
11) but ✅
Structural reason: “long” contrasts with “easy to follow” → but.
Meaning logic: Many long reports are hard, but this one is still easy.
Rhetorical effect: Balanced academic evaluation (near-native style).
Why wrong answers fail:
and would simply add, but it misses the contrast nuance.
because would claim long causes easy, which is wrong.
Keyword embed: High-value contrast for IELTS A1 linking words.
12) so ✅
Structural reason: Missed bus → arrived late (result).
Meaning logic: This is classic cause–effect.
Rhetorical effect: Clear narrative in listening tests.
Why wrong answers fail:
because would reverse logic given clause order.
while suggests simultaneity, not result.
Keyword embed: because vs so grammar for TOEFL beginner connectors.
13) and ✅
Structural reason: “new to the lab” + “asks many questions” is addition (two facts).
Meaning logic: The second clause describes behavior; it is not a guaranteed result word like “so” (even if it’s logical).
Rhetorical effect: Neutral academic description.
Why wrong answers fail:
because would imply “He is new because he asks questions” (wrong).
so implies direct cause; in many exam keys, this is treated as simple addition.
Keyword embed: basic connectors A1 (and) in academic context.
14) because ✅
Structural reason: “because” gives the reason: stayed home due to rain.
Meaning logic: Rain causes staying home.
Rhetorical effect: Clear causal explanation sentence.
Why wrong answers fail:
but would require contrast.
when would only set time, not cause.
Keyword embed: Reinforces cause and effect because so.
15) so ✅
Structural reason: Studied hard → passed (result).
Meaning logic: Effort leads to success.
Rhetorical effect: Classic exam cause–effect line.
Why wrong answers fail:
because would reverse cause logic: passed because studied hard (possible in another structure, but here connector must introduce result).
while indicates time overlap, not result.
Keyword embed: Tests because vs so grammar and YDS linking words questions.
