Simple past tense how can I use

Simple past tenseAffirmative

sub+v^2+obj

Negative

Sub+did not+v1+obj

Interrogative

Did+sub+v1+obj?

Wh+did+sub+v1+ obj?

Passive

obj+was/were+V3+by+sub

The simple past is used:To denote completed/finished event or situation with a last time referenceTo express past facts or generalizations or situations which are no longer trueA series of completed action in the pastDuration of any completed action Which starts and stops in the past.With adverbs of time:

yesterday,ago,last week, last month,just now,in the past etc..

With when clause(before event)Hope it helps

Good luck on your assignment