if引导的条件状语从句
含有if引导的条件状语从句的复合句表示假如有从句动作的发生，就会有主句动作的发生。
通常如果主句用一般将来时，if引导的条件状语从句用一般现在时。如：
If he misses the last bus, he'll have to walk home.
We'll have a party in the garden if the weather is good.
如果主句是祈使句或者主句的谓语部分含有情态动词，if引导的条件状语从句也常用一般现在时。如：
If anyone calls, tell them I'm very busy.
If it rains, you can stay at home and relax.
【链接】
本单元还学了连词unless，可意为“除非；如果不”，通常可以和if ... not互换使用。如：
He won't go to sleep unless you tell him a story.
=He won't go to sleep if you don't tell him a story.
【运用】
含有if和unless引导的条件状语从句的复合句
Ⅰ. 句型转换
Ⅰ. 根据所给词语的提示填空
1. If you _______(not listen) to your teacher carefully, you _______(miss) some important points.
2. If we _______(take) a map with us when we travel, we _______(not get) lost.
3. They _______(not win) the game unless they _______(practice) hard.
4. If he _______(not get) up now, he _______(be) late for school.
5. What _______ you _______(do) if you _______(have) a lot of money
6. If you _______(see) Helen, _______(give) her this notebook.
Ⅱ.单项选择
1. —I really want to go to college for further study.
—Believe in yourself. If you _______ hard, your dream will come true.
A. will study B. studied C. study
(2020 湖南郴州)
2. Vivian will take her daughter to the amusement park _______ she gets the tickets.
A. if B. until C. although D. unless
(2020 上海)
3. Nobody can hear you _______ you speak in a louder voice.
A. unless B. if C. when D. after
(2020 重庆A卷)
4. We won't believe it _______ we see it with our own eyes.
A. because B. unless C. if D. after
(2021 广西梧州)
★Word Bank★
amusement park 游乐场
voice 声音
答案
Ⅰ. 1. don’t listen; will miss 2. take; won’t get
3. won’t win; practice 4. doesn’t get; will be
5. will; do; have 6. see; give
Ⅱ. 1-4 CAAB针对他人烦恼提建议
【写作任务】 (Section B 3c)
英语课上，老师让同桌之间讨论各自的烦恼，并就对方的烦恼提出建议。假如你的同桌Sam有两个烦恼：一是因为写作业睡得晚，导致他每天都觉得很累；二是马上要考试了，他感到很紧张。请你根据Sam的烦恼写一篇短文，给出解决办法，在下节口语课上展示。
【审清题目】
内容：针对他人的烦恼提出建议。
文体：说明文
时态：以一般现在时为主
人称：以第三人称为主
【头脑风暴】
【提供素材】
Problems Reasons Advice Consequences
Feel tired Be lack of (缺乏) sleep Do homework as soon as he / she gets home; Don’t spend too much time playing and (1)______________(不要熬夜). He / She will get enough sleep.
Feel nervous (焦虑的) before exams Be worried about his / her exam results Exercise or listen to music; Prepare himself / herself well for the exams. He / She will feel relaxed and confident (自信的) when taking exams.
Feel stressed (有压力的) Have no / little time for hobbies (2)______________(为学习和爱好制定一个计划). He / She will have time to enjoy his / her hobbies.
Get short-sighted (近视的) Read books in the sun or in bed (3)______________(以正确的方式阅读); Wear the right glasses. His / Her eyesight (视力) will not get worse.
Get heavy Eat too much junk food and hardly exercise Don’t use pocket money (零花钱) to buy snacks (零食) but to buy something useful; (4)______________(每天做运动). He / She will get healthy.
Key:
1. don’t stay up late
2. Make a plan for studies and hobbies
3. Read in a right way
4. Do / Take exercise / Do / Play sports every day
【谋篇布局】
将括号内的汉语翻译成英语，补全短文。
Key:
1. He doesn’t do his homework first after school
2. he will be able to go to bed early / he can go to bed early
3. He doesn’t think he will get good grades
4. These are all good ways to help relax
◆句型
I’d like to give ... some advice.
I think he / she should ...
If he / she ..., he / she will ...
If he / she takes / follows my advice, he / she will ...
Why not ...
He / She’d better ...
It’s better for him / her to ...
Key:
1. don’t stay up late
2. Make a plan for studies and hobbies
3. Read in a right way
4. Do / Take exercise / Do / Play sports every day
