past continuos

1. conectors

1.1. before

1.2. but

1.3. or

1.4. not what

2. use

2.1. we use the past continuos to say what was happening around (before,at,after) a past time.

3. form

3.1. afirmative

3.1.1. use was , were followed by the verb + ing

3.2. negative

3.2.1. use was not , were not followed by the verb + ing

3.3. interrogative

3.3.1. use was, were + subject pronoun + verb + ing