Remember, in the interrogative forms, we use this formula:
(Do, does, did) + subject + main verb + object?
Ex: Do you open the door?
Does she cook the food?
Did they go by bus yesterday?
The short answers will be:
Yes, + subject + (do/does/did).
No, + subject + (do/does/did) + not.
Ex: Do you open the door? Yes, i do. or No, i don't.
Did they go by bus yesterday? Yes, they did. or No, they didn't.
The short answers will be:
Yes, + subject + main verb + object.
No, + subject + (do/does/did) + not + main verb + object.
Ex: Do you open the door? Yes, open the door. or No, i don't open the door.
Did they go by bus yesterday? Yes, they went by bus yesterday. or No, they didn't go by bus yesterday.
Do and does use to build questions in the present simple. Did are used in the past simple.
In the interrogative forms, the formula will be:
Subject + (Do, does, did) + not + main verb + object?
Ex: They do not ( don't) open the door.
She does not ( doesn't) eat that.
We did not (didn't) go with them.
Does or doesn't are used with the subject: he (Juan), she (Ana) and it ( the dog).
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