The past simple verb tense is used when:

1. The action happened in the past
2. The action/event is completed /finished at the time of speaking.
3. The time or/and place is stated or understood.
4. The length of the event/action is not important.

Some Examples:

1. I went to the school.
2. We did not not to the English class today.
3. They did eat lunch at school.