Past simple tense: Interrogative 
Interrogative form is so easy. We have to put auxiliar "DID" before noun, and after noun, infinitive verb without "TO"
For instance:
Did you eat something before to come?
Did he go to school?
Did we do homework yesterday?
Verb "TO BE"
It happens exactly the same, we have to put "WAS/WERE" before noun.
For example:
Was he in the school yesterday?
Were we happy?
Were you here?
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Past Simple Tense