Third Conditional: Complete the Sentences
Sixteen focused third conditional sentence-completion questions with generous writing space and a complete answer key.
What’s in the worksheet?
- Sixteen sentence-completion questions
- Affirmative, negative and question forms
- Generous answer spaces
- Complete answer key on page 2
Complete 16 third-conditional sentences about alternative past events. Both clauses need forms, with negatives and a question about missing a flight.
Worksheet preview
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Page 1 of 2 · A4 printable PDF
Page 2 of 2 · Answer key · A4 printable PDF
A simple way to teach it
Before the lesson
Use the practice page with the full-sentence key withheld. Review had + participle and would have + participle.
- Model leaving earlier and catching the train. Explain that the sentence imagines a different past, not a current plan.
- Complete all items, checking caught, brought, been and woken alongside regular participles. Retain the auxiliary sequence in negatives.
- Compare with page 2 and explain the imagined condition and result. Practise What would you have done? as a complete question.
Support and extension
Support with colour-coded clauses. Extend by rewriting one example with the clauses reversed; accept suitable standard participle variants such as got or gotten where appropriate.
Suggested approach. Adjust the pace and number of questions to suit your class.
