Explanation
Past simple negatives and questions
We use did and didn’t to make negatives, questions and short answers in past simple.
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Word order in questions
Remember that the word order in questions is QWASI: (Question Word), Auxiliary (did), Subject, Infinitive.
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Infinitive without to
We use did or didn’t with the bare infinitive of the main verb (= infinitive without to).
- I didn’t work yesterday. (NOT
I didn’t worked.) - Did you go to the concert? (NOT
Did you went…?)
Don’t use did in positive sentences
We use did or didn’t in negatives, questions and short answers, but NOT in positive sentences.
- We stayed home yesterday. (NOT
We did stay home yesterday.) - I went out last night. (NOT
I did go out last night.)
Did or was/were?
We use did and didn’t (NOT was/wasn’t or were/weren’t) as the auxiliary verb in negatives and questions in past simple.
- We didn’t eat at 6. (NOT
We weren’t eat.) - Did you do your homework? (NOT
Were you do your homework?)
We do NOT use did or didn’t in past simple negatives or questions when the main verb is be.
- They weren’t happy. (NOT
They didn’t be happy.) - Was he at home? (NOT
Did he be at home?)
