Be

1. Functions

1.1. Auxiliary

1.1.1. sentences

1.1.1.1. affirmative

1.1.1.2. negative

1.1.2. Questions

1.1.2.1. Yes-No

1.1.2.2. Information wh

1.2. Verb

1.2.1. Linking

2. Forms

2.1. present

2.1.1. am-is-are

2.2. Present participle

2.2.1. being

2.3. Past

2.3.1. was-were

2.4. Past participle

2.4.1. been

2.5. Infinitive

2.5.1. to be

3. Uses

3.1. States

3.2. Emotions

3.3. Existence

3.4. Identify

3.5. Describe

3.6. Location

3.7. Actions in progress

3.8. Future

3.9. Ability

3.10. Passive voice