Viết các câu sau ở thể khẳng định (+), thể phủ định (-), thể nghi vấn (?) ở thì hiện tại hoàn thành

EX7. Viết các câu sau ở thể khẳng định (+), thể phủ định (-), thể nghi vấn (?) ở thì hiện tại hoàn thành.

1. (+)I have finished my homework.

(-) ________________________________________________________________.

(?) ________________________________________________________________?

2. (+)________________________________________________________________.

(-)My uncle hasn’t been to Singapore before.

(?) ________________________________________________________________?

3. (+)________________________________________________________________.

(-) ________________________________________________________________.

(?)Have they found their keys?

4. (+)Jim has just played video games with his brother.

(-) ________________________________________________________________.

(?) ________________________________________________________________?

5. (+) ________________________________________________________________.

(-)My grandmother hasn’t visited me since November.

(?) ________________________________________________________________?

6. (+) ________________________________________________________________.

(-) ________________________________________________________________.

(?)Has your sister studied Medicine for 2 years?

7. (+) It has been long since our last encounter.

(-) ________________________________________________________________.

(?) ________________________________________________________________?

8. (+) ________________________________________________________________.

(-)We haven’t graduated yet.

(?) ________________________________________________________________?