PAST SIMPLE

It is a tense that is used to express actions which took place in the past, regardless of the time over the past in which they occurred.
Interrogative: Subject+ verb in past+ complement
Negative: Subject+ Didn´t+ verb(inf)+ complement
Affirmative: Did+ subject+ verb(inf)+complement

Tips: In the affirmative tenses you have to be carefully, because sometimes the verbs is regular or irregular.