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?
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).
