Modal Perfects

B2 · Upper IntermediateModal Verbs

Should have, could have, and would have let you talk about things that didn't happen — a missed chance, a wrong choice, or an imagined alternative.

What you'll learn

  • Should have + past participle for regret or criticism about a past action (or inaction)
  • Could have + past participle for an ability or opportunity that existed but wasn't used
  • Would have + past participle for a hypothetical result, often in conditional sentences
  • Shouldn't have describes something that happened but was the wrong choice

Looking back at what didn't happen

Should have, could have, and would have all combine a modal with have + past participle to talk about the past — but each one adds a different kind of meaning: regret, missed opportunity, or hypothetical result.

"You should have called me — I was worried."
"I could have helped you, but I didn't know you needed it."

Should have: regret and criticism

Should have expresses regret about something that wasn't done, or criticism of a choice. Shouldn't have does the opposite: it criticizes something that WAS done.

"He should have apologized sooner."
"You shouldn't have spent all that money."

Could have: unrealized ability or opportunity

Could have describes an ability or opportunity that existed in the past but wasn't used — often with a reason why not.

"We could have won if we'd played better."
"They could have told us sooner."

Would have: a hypothetical past

Would have describes what would have happened in an imagined, different past — very common in third conditional sentences with if + had.

"If I had known, I would have come earlier."
"I wouldn't have said that if I'd known it would upset you."

Real English

"You shouldn't have worked so late."
"I could have helped you, but I didn't know."
"I wouldn't have believed it if I hadn't seen it myself."
"She could have won the race, but she twisted her ankle."

Watch out

✗He should apologized sooner.
✓He should have apologized sooner.

Don't drop have — modal perfects need modal + have + past participle, not the simple past.

✗You shouldn't worked so late.
✓You shouldn't have worked so late.

Shouldn't have needs have before the past participle, just like should have.

✗If I had known, I would come earlier.
✓If I had known, I would have come earlier.

In a hypothetical past, use would have + past participle, not just would + base verb.

Real life — After missing an event

"You should have come to the party, it was great!"

"I know, I wish I had. I could have come, but I was too tired."

"That's a shame. You would have loved the food."

"Next time I definitely will."

Practice

Exercise 1 · Choose the correct sentence

Choose the correct sentence — regret or criticism about the past.

Exercise 2 · Choose the correct sentence

Choose the correct sentence — unrealized past ability.

Exercise 3 · Choose the correct sentence

Choose the correct sentence — a hypothetical past.

Exercise 4 · Choose the correct negative

Choose the correct negative.

Exercise 5 · Choose the correct sentence

Choose the correct sentence — criticism of a past action that did happen.

Exercise 6 · Choose the correct answer

Which modal perfect expresses regret about something NOT done?

Exercise 7 · Choose the correct sentence

Choose the correct sentence.

Exercise 8 · Choose the correct sentence

Choose the correct sentence.

Exercise 9 · Complete the sentence

Complete (regret): 'I ___ (should/study) harder for that exam.'

Exercise 10 · Complete the sentence

Complete (unrealized ability): 'She ___ (could/win) the race, but she twisted her ankle.'

Exercise 11 · Sort into groups

should have called
shouldn't have called
could have won
couldn't have won
would have helped
wouldn't have helped

0 / 6 sorted

Quick challenge

Five quick questions to check what stuck.

Question 1 / 5

Score: 0/0

Choose the correct sentence.

You learned

  • Should have expresses regret or criticism about a past action or inaction.
  • Could have describes an unused ability or opportunity in the past.
  • Would have describes a hypothetical result in an imagined past.
  • All three need have + past participle — the simple past isn't enough.

Related grammar lessons

Upper IntermediateModal Verbs

Modal Verbs of Deduction

Learn how to draw confident conclusions from evidence in English using must (positive) and can't (negative) — and how they differ from must not.

Upper IntermediateModal Verbs

Modal Verbs of Possibility

Learn how to express possibility in English with may, might, and could — for the present, future, and past.

IntermediateModal Verbs

Need, Needn't and Don't Need To

Learn the two faces of need in English — as a modal verb (needn't) and as a regular verb (don't need to) — and how needn't have + past participle works.

IntermediateModal Verbs

Should, Ought To and Had Better

Compare three ways to give advice — should, ought to, and had better — and learn how their grammar and strength differ.

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