Question

Choose the right tense form. 1. We haven’t been having/ haven’t had a holiday for 5 years. 2. She has been teaching/has taught at this school for twenty years. 3. David has been painting/has painted in his studio since 10 o’clock. 4. Mary and Sam have collected/ have been collecting stamps for 3 years. 5. Their parents have been/have being friends since their childhood. 6. Dave has been/ has been being a student for 2 years.

Answer 1

1. 1
2. 1
3. 1
4. 2
5. 1
6. 1

Answer 2

1. We haven’t had a holiday for 5 years.
2. She has been teaching at this school for twenty years.
3. David has been painting in his studio since 10 o’clock.
4. Mary and Sam have been collecting stamps for 3 years.
5. Their parents have been friends since their childhood.
6. Dave has been a student for 2 years. (Note: "has been being" is not a common or correct construction in this context.)