Change the sentence into present tense, past tense and present perfect tense. 1.your uncle is choosing something 2.the old man will not sell his old car 3.it is

Change the sentence into present tense, past tense and present perfect tense.
1.your uncle is choosing something
2.the old man will not sell his old car
3.it is not raining out side
4.the headmaster are having dinner together
5.your parent may come here
6. Will the young man stay here?
7.may the children take me there.
8. The doctor is injecting twice a day
9. Their teacher won't be angry
10. I and him will have much money
help me please