Make sentences in Present Perfect.
1. She (to buy) a new car?
2. I (to give up) smoking.
3. My father (not to start) a new job.
4. I (to write) a letter but I (not post) it yet.

1.Has she bought a new car?2.I have given up smoking.3.My father hasn't started a new job.4. I have written a letter but I haven't posted it yet.