SIMPLE PAST TENSE

Common form:
S + V2 +/- O/C

Very often the V2 ends in –ed (regular verb)
Ex: worked, stopped, invited, studied, etc.

But many verbs are irregular. It does not end in –ed.
Ex: write ==> wrote
see ==> saw
go ==> went
read ==> read

In question and negative sentence, past simple uses did/did not.
(-) S + did not + V1 +- O/C
(?) Did + S + V1 +- O/C?
Ex:
A: Did you go out last night?
B: Yes, I went to the cinema but I did not enjoy the movie.

The past of be (is/am/are) is was/were.
Remember we do not use did in question & negative with was/were.
Ex:
1. I was angry because they were late.
2. Was the weather good when you were in holiday?