SIMPLE PAST INTERROGATIVE

• Even if the verbs are regular, to make an interrogation the auxiliary verb "to do" is used in the past (did). The proper structure of this verb tense is the following:
  

 

Did + [Subject] + [Verb in infinitive (without "to")]?

• If the interrogation had an interrogative particle, the structure would be as follows:
  

[Interrogative particle] + did + [Subject] + [Verb in infinitive]?