Verb to be

1. Do-Does-Did

1.1. Present

1.1.1. Do-Does

1.2. Past tense

1.2.1. Did

1.3. Past participle

1.3.1. Done

2. To have

2.1. Have

2.1.1. I

2.1.2. You

2.1.3. We

2.1.4. They

2.2. Has

2.2.1. He

2.2.2. She

2.2.3. It

3. Past

3.1. Were

3.2. Was

4. Present

4.1. Am

4.2. Is

4.3. Are

5. Used to

5.1. Positive form

5.1.1. Subj + use to + verb

5.2. Negative form

5.2.1. Subj + didn t + use to + verb