PAST CONTINUOUS

1. FORM

1.1. Affirmative

1.1.1. You were studying when she called

1.2. Negative

1.2.1. He wasn't paying attention when she wrote a letter.

1.3. Interrogative

1.3.1. Were you listening while she was talking ?

2. USES

2.1. Interrupted Action in the Past.

2.1.1. I was reading a book when the bell rang.

2.2. Specific Time as an Interruption

2.2.1. Last night at 6 PM, I was eating dinner.

2.3. Parallel Actions

2.3.1. Thomas wasn't working, and I wasn't working either.