四、用所给单词的适当形式填空。
1. If it (rain) tomorrow, we will stay at home.
2. When he (come), I will let you know.
3. She didn't go out because she (feel) unwell.
4. While I (walk) home, I met an old friend.
5. I won't leave until you (return).
6. If you (not hurry), you will miss the bus.
7. Plant trees where there (be) plenty of sunlight.
8. He will make progress if he (practice) every day.
9. As soon as I (receive) the email, I will reply.
10. He is excited because he (pass) the test.

1. rains
2. comes
3. felt
4. was walking
5. return
6. don't hurry
7. is
8. practices
9. receive
10. passed

五、判断句子正(√)误(×),画出错误的部分并改正。
1. If it will rain tomorrow, we won't have a picnic. ()
2. I will call you when he arrives. ()
3. Because I was tired, so I went to bed early. ()
4. He waited until the rain stopped. ()
5. While I read a book, she was drawing. ()
6. He didn't come back until it was dark. ()

1. ×;$\underline{will\ rain}$→rains
2. √
3. ×;$\underline{so}$→so(去掉so)
4. √
5. ×;read→ was reading
6. √

六、中译英。
1. 如果你努力学习，你就会取得好成绩。

2. 他没去野餐，因为他生病了。

3. 直到爸爸回来，我才睡觉。

4. 我一到学校就会给你打电话。

5. 汤姆在做作业时，他妈妈在看电视。

6. 无论你何时需要帮助，我都会在你身边。

1. If you study hard, you will get good grades.
2. He didn't go for the picnic because he was ill.
3. I didn't go to bed until my father came back.
4. I'll call you as soon as I get to school.
5. While Tom was doing his homework, his mother was watching TV.
6. Whenever you need help, I will be there for you.