It is formed with the verb 'to be' in the past (was/were) + the main verb with '-ing'.

Example: 'I was studying at 8 PM'.

Affirmative: Subject + was/were + verb in -ing (Ex. I was playing).

Negative: Subject + was/were + not + verb in -ing (e.g. They weren't playing).

Interrogative: Was/were + subject + verb in -ing? (e.g. Were you studying?).

1. She ______ (study) at 7 PM.

2. They ______ (play) soccer when I saw them.

3. I ______ (watch) TV when the phone rang.

4. He ______ (read) a book at 8 PM last night.

5. We ______ (eat) dinner when they arrived.

6. They ______ (dance) at the party when I came in.

7. She ______ (write) an email when her friend called.

8. The kids ______ (play) outside when it started to rain.

9. I ______ (clean) the house all morning.

10. He ______ (work) on his project yesterday at 10 o'clock at night.

11. ______ (travel) to the beach when we saw the accident.

12. You ______ (talk) to Jane when I left the room.

Reply by making a comment on this post.