English Grammar in Use · Murphy
Intermediate Grammar
Master English grammar one unit at a time. Clear notes, then 40+ interactive exercises with instant feedback – based on the topics in English Grammar in Use (Intermediate).
UNIT 1
Present continuous
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UNIT 2
Present simple
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UNIT 3
Continuous or simple?
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UNIT 4
Action or state?
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UNIT 5
Past simple
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UNIT 6
Past continuous
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UNIT 7
Present perfect
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UNIT 8
Present perfect
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UNIT 9
Present perfect cont.
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UNIT 10
Perfect: cont. or simple?
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UNIT 11
How long…?
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UNIT 12
For & since
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UNIT 13
Perfect vs past 1
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UNIT 14
Perfect vs past 2
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UNIT 15
Past perfect
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UNIT 16
Past perfect cont.
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UNIT 17
Have & have got
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UNIT 18
Used to (do)
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UNIT 19
Future: present tenses
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UNIT 20
Future: going to
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UNIT 21
Future: will/shall
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UNIT 22
Future: will/shall 2
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UNIT 23
Future: will / going to
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UNIT 24
Future cont. & perfect
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UNIT 25
When & if
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UNIT 26
Can/could/able to
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UNIT 27
Could / could have
● You’re here
UNIT 28
Must / can’t
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UNIT 29
May and might 1
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UNIT 30
May and might 2
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UNIT 31
Have to and must
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UNIT 32
Must / mustn’t / needn’t
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UNIT 33
Should 1
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UNIT 34
Should 2
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UNIT 35
Had better / It’s time
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UNIT 36
Would
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UNIT 37
Requests & offers
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UNIT 38
If I do / If I did
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UNIT 39
If I knew / I wish I knew
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UNIT 40
If I had known / I wish I had known
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UNIT 41
Wish + would
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UNIT 42
Passive 1
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UNIT 43
Passive 2
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UNIT 44
Passive 3
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UNIT 45
Passive 4
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UNIT 46
Have something done
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UNIT 47
Reported speech 1
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UNIT 48
Reported speech 2
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UNIT 49
Questions 1
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UNIT 50
Questions 2
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UNIT 51
Auxiliary verbs
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UNIT 52
Question tags
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UNIT 53
Verb + -ing
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UNIT 54
Verb + to …
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UNIT 55
Verb + object + to …
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UNIT 56
Verb + -ing or to … 1
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UNIT 57
Verb + -ing or to … 2
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UNIT 27 · Intermediate · B1–B2
Could (do) and could have (done)“could / could have done” – 44 interactive questions
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Correct answers
🎉 Brilliant! You finished all 44 questions of Unit 27!
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Video lesson – coming soon
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📖 Grammar Reference – Could (do) and could have (done)
Study the notes, then work through the six exercises.
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What you’ll learnCould (do) for present possibility vs Could have (done) for missed past opportunities
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~20 min4-Tier notes + 4 exercises (27.1–27.4)
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26 questionsInstant automated feedback
1 Tier 1 – The Concept & Nuance: Present Possibility vs Missed Past Actions
Could do expresses present or future possibility (“We could go to the cinema tonight”). Could have done means you had the ability or opportunity to do something in the past, but you did not do it.
💡 Present / Future Possibility (Could do)
– “What shall we do this weekend? — We could visit Grandma.”
⏪ Missed Opportunity (Could have done)
– “Why did you stay at a hotel? You could have stayed with us.”
2 Tier 2 – I couldn’t do it vs I couldn’t have done it
| I couldn’t live without you. | Hypothetical present impossibility. |
| I couldn’t have passed without you. | Past impossibility: it would have been impossible even if I tried. |
3 Tier 3 – Top 3 Common Learner Pitfalls
✗ You could help me yesterday! Why didn’t you?
✓ You could have helped me yesterday!
– Rule: Criticizing past missed action requires could have + V3.
✗ I could have bought that jacket, so I bought it.
✓ I could have bought that jacket, but I chose not to.
– Rule: Could have done implies the action was NOT completed.
✗ The accident could been worse.
✓ The accident could have been worse.
– Rule: Always include the auxiliary have (could have been).
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Tier 4 – Interactive Practice: Work through Exercises 27.1–27.4 below with instant scoring!
Made with care for English learners · allenglish4u.com
Original practice material inspired by the English Grammar in Use syllabus (Cambridge University Press). Example sentences and exercises are written by All English 4U.