2.

(+) We have been here for two weeks.

(?) Have they been here for two weeks?

3. 

(+) We have missed the train.

(-) We haven't missed the train.

4. 

(-) I haven't had breakfast this morning.

(?) Have you had breakfast this morning?

5.

(+) She has passed the exam.

(?) Has she passed the exam?

6.

(+) I have met his mother.

(-) I haven't met his mother.

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.

* Công thức thì hiện tại hoàn thành:

(+) S + have / has + V-ed (hoặc có quy tắc) + ....(phần còn lại)

(-) S + haven't / hasn't + V-ed (hoặc có quy tắc) + ....(phần còn lại)

(?) Have / has+ S + V-ed (hoặc có quy tắc) + ....(phần còn lại)

@sakura

*cho mk câu trả lời hay nhất + 5 sao + cảm ơn nha

                                   CHÚC BẠN HỌC TỐT!

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