помогите сделать упражнение по английскому языку?

1.The old gentleman doesn’t go out in winter. He (go) out when the weather (get) warmer.
2.I (wait) for the doctor until he (come) back from the hospital.
3.I’m afraid the old woman (die) before she (see) her son.
4.The teacher said, “I (begin) the lesson as soon as Jack (stop) talking.”
5.He (not pass) the examination next summer if he (not work) much harder.
6.He (have) a bad accident if he (not drive) more carefully.
7.She’s flying to Rome tomorrow. She (send) her family a telegram as soon as she (arrive).
8.She told her guests, “We (have) lunch when my son (come) home from school”.
9.You (be) late if you (not take) a taxi.
10.I (not speak) to him again if he (not apologize).
11.We (have) a picnic tomorrow if it (be) a fine day.
12.I (finish) reading this book before I (go) to bed.
13.I’m sure he (write) to me as soon as he (know) my new address.
14.Peter has borrowed my dictionary. He (give) it back when he (see) me tomorrow.
15.The postman (start) work tomorrow before the sun (rise).
16.The little boy (not be) happy until his father (buy) him a bicycle.
17.She (wash) my shirts tomorrow if she (have) time.
18.We (go) out when it (stop) raining.
19.If he (not run) he (not catch) the train.
20.If you (think) it over you (see) that I’m right.