1. Be
2. Past Simple
2.1. I was
2.1.1. To talk about actions in the past that have finished
2.1.1.1. How?
2.1.1.1.1. It talks about 'then' and excludes 'now
2.1.2. For a past action when the time is given
2.1.3. When we report about past events in chronological order
2.1.4. When we talk about longer action that have a duration which started and stoped in the past
2.1.5. For describing a habit which stopped in the past
2.1.6. For repeated past actions or habits
2.1.7. For describing past facts or generalizations which are no longer true
2.2. You Were
2.2.1. Yesterday
2.2.2. Ago
2.2.3. Last year
2.2.4. In 1991
2.2.5. At 3 o'clock
2.2.6. From Monday to Friday
2.3. was
2.3.1. He
2.3.1.1. Positive form
2.3.1.1.1. add -ed to the base form
2.3.1.2. Negative form
2.3.1.3. Interrogative form
2.3.2. She
2.3.2.1. practice
2.3.2.1.1. Positive form
2.3.2.1.2. Negative form
2.3.2.1.3. Interrogative form
3. Past Perfect
3.1. When we use it
3.1.1. For reports what people had said, thought or believed.
3.1.2. For talking about what happened before some point in the past
3.1.2.1. How?
3.1.2.1.1. Look back on actions in the past from the present
3.1.3. Express the cause of another past action/state
3.1.4. To emphasize the fact that certain activity was completed or finished by a certain time in the past
3.1.5. With Reported speech
3.1.6. When we wont to show our dissatisfaction with the past
3.2. Time expressions
3.2.1. Ever
3.2.2. Never
3.2.3. Since
3.3. Word formation
3.3.1. Regular verbs
3.3.1.1. Had and the -ed form
3.3.1.1.1. Positive form
3.3.1.1.2. Negative form
3.3.1.1.3. Interrogative form
3.3.2. Irregular verbs
3.3.2.1. Had and Past Participle