Bài 4.
1.He hasn’t lived here for three years.
Has he lived here for three years?
2. We have been here for two weeks.
Have we been here for two weeks?
3. They have missed the train.
They haven’t missed the train.
4. I haven’t had breakfast this morning.
Have I had breakfast this morning?
5. She has passed the exam.
Has she passed the exam?
6. You have met his mother.
You haven’t met his mother.
7. We haven’t eaten too much chocolate.
Have we eaten too much chocolate?
8. I haven’t known David for ten years.
Have I known David for ten years?
9. She has read that book.
She hasn’t read that book.

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