I wish I (not, eat) so much yesterday.

2. I wish I (speak) Italian.

3. I wish you (stop) smoking. (You are smoking at the moment and it is annoying me.)

4. I'd rather you (be) rich than poor.

5. If I (be) you, I (not, poke) my nose everywhere.

6. If she (not, miss) the bus an hour ago, she (be) here now.

7. If you (be) late again, I (have to fire) you.

8. If you (go) to bed in time, you (not, oversleep) your interview yesterday.

1)I wish eat so much yesterday.

2. I wish speaking Italian.

3. I wish you stop smoking. You are smoking at the moment and it is annoying me.)

4. I'd rather you be rich than poor.

5. If I be you, I not poked my nose everywhere.

6. If she not missing the bus an hour ago, she here now.

7. If you be late again, I have to fired you.

8. If you going to bed in time, you not oversleep your interview yesterday.

1. i exercise regularly in summer but more to do in winter. 2. she usually walks slowly but now she is walking even   faster . 3. nina speaks loudly but mary speaks even   louder . 4. he runs fast, than other boys. 5. i don’t sleep enough, less   than 8 hours. 6. he behaves badly, than other boys. 7. i smile often, more than my sister. 8. peter lives far from school, but ann lives closer .

я думаю, что  4 и в 6 предложениях ничего изменять не надо. может я ошибаюсь.

все ваши предложения в прошедшем времени,поэтому используем past perfect passive.

they said the medicine had been prescribed by the doctor.

  he understood that the house had been robbed by the thieves.

  she said he had been seen the night before with a pretty girl in the club.

  he said that his walkman had been given to him by his mother as