Formation

to be (was, were) + Infinitiv + -ing

Usage

1. An action was in progress in the past:

Peter was reading a book yesterday evening.

2. Two actions took place at the same time in the past:

Anne was writing a letter while Steve was reading the New York Times.

3. Together with a simple past action:

While we were sitting at the breakfast table, the telephone rang.

4. Repeating actions in the past, where the speaker wants to express favour or dissatisfaction:

Andrew was always coming late.

Examples

I was playing football.

You were playing football.

He was playing footbal.

Negations:

LongformShortform
I was not playing football.I wasn’t playing football.
You were not playing football.You weren’t playing football.
He was not playing football.He wasn’t playing football.

Questions:

Was I playing football?

Were you playning football?

Was he playing football?