Answer:
1. She has written a letter. (Future Perfect Tense)
Ans. She will have written a letter.
2. Her uncle drives a car. (Past Continuous Tense)
Ans. Her uncle was driving a car
3. She will buy a new dress. (Simple Present Tense)
Ans. she buy a new dress
4. He has typed a letter. (Present Continuous Tense)
Ans. He is typing a letter
5. They were doing homework. (Past Perfect Continuous Tense)
Ans. They had been doing homework
6. We have made a plan. (Simple Future Tense)
Ans. We will make a plan
7. She had been watching television. (Future Continuous Tense)
Ans. She will be watching television
8. He had broken the vase. (Present Perfect Tense)
Ans. He has broken the vase.
9. They go to the cinema. (Future Perfect Continuous Tense)
Ans. They will have been going to the cinema.
10. John And Sarah will talk to each other. (Simple Past Tense)
Ans. John And Sarah talked to each other.
11. The cat ate all the chicken. (Present Perfect Continuous Tense)
Ans. The cat has been eating all the chicken
12. The car stops at the traffic light. (Past Perfect Tense)
Ans. The car had stopped at the traffic light.