Ex.1
0. Has Tony finished his homework yet?
1. Has Mark ever eaten sushi?
2. Where has she been?
3. Have you written a test yet?
4. Have the children gone to the library this afternoon?
Ex.2
1. hasn't finished
2. hasn't invited
3. hasn't seen
4. hasn't been
Ex.3
1. ever
2. yet
3. for
4. just
5. never
6. since
