Past Continuous

1. FORM

1.1. Affirmative

1.1.1. You were studying when she called.

1.2. Negative

1.2.1. You were not studying when she called.

1.3. Interrogative

1.3.1. Were you studying when she called.

2. USES

2.1. Interrupted Action in the Past

2.1.1. I was watching TV when she called.

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. I was studying while he was making dinner.