EXERCISE. WRITE THE SENTENCES IN PRESENT PERFECT. IF NEGATIVE THEN WRITE A QUESTION, IF IT IS AFIRMATIVE, THEN PUT IT INTO NEGATIVE, IF IT IS A QUESTION, WRITE AN ANSWER.

1. not /work) today .
2. We (buy) a new lamp.
3. We (not/plan ) our holiday yet.
4. Where (be/ you)?
5. He (write) five letters.
6. She (not/him for a long time.
7. ( be/you at school?
8. School (not/start yet.
9. ( speak / he to his boss?
10. No, he (havethe time yet