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语法天天练 · 九年级下册语法训练营
Day 4 状语从句复习
一、方法导学
核心口诀
if 如果，unless 除非，主将从现要牢记；
as soon as 一就，动作先后紧相依；
because 表原因，不和 so 放一起。
从句类型一览
从句类型 连词 含义 核心规则
条件状语从句 if, unless 如果；除非 主句将来时，从句用一般现在时表将来
时间状语从句 as soon as 一……就 先后连续动作，遵循主将从现
原因状语从句 because 因为 because 与 so 不能同句连用
易错提醒
unless = if…not，从句内部不要再加否定词 not。
例如：You will fail unless you work hard.（不能说 unless you don’t work hard）
二、基础过关
A. 选词填空（if, unless, as soon as, because）
1. We will reduce pollution ________ everyone takes small actions.
2. ________ we protect natural resources, the environment will become worse.
3. He will sort waste ________ he gets home every day.
4. We should reuse old things ________ resources are limited.
5. You can’t protect the earth well ________ you give up disposable plastic.
6. ________ you start recycling today, you will see a difference soon.
7. The community will be cleaner ________ everyone stops littering.
8. She will turn off the tap ________ she finishes washing her hands.
B. 单项选择
1. Our earth will become cleaner ______ each of us does our part.
A. if　 B. unless　 C. because　 D. so
2. You can’t cut down waste ______ you change your living habits.
A. if　 B. unless　 C. as soon as　D. because
3. I will turn off the lights ______ I leave the room.
A. as soon as　B. because　C. unless　 D. so
4. We should recycle rubbish ______ it helps save materials.
A. unless　 B. because　 C. if　 D. though
5. ______ we don’t act now, the pollution will get worse.
A. Unless　 B. If　 C. Because　 D. As soon as
6. He will join the environmental club ______ he gets to school.
A. because　 B. unless　 C. as soon as　D. if
7. You will waste a lot of paper ______ you use both sides.
A. if　 B. unless　 C. because　 D. as soon as
C. 句型转换
1. If you don’t save paper, you will waste lots of wood.（用 unless 改写）
______________________________________________________________________
2. He will collect litter. He arrives at the park.（用 as soon as 合并句子）
____________________________________________________________________
3. We should stop throwing rubbish into rivers. Dirty water kills river animals.（用 because 合并句子）
____________________________________________________________________
4. If she doesn’t finish her homework, she won’t go out.（用 unless 改写）
____________________________________________________________________
5. I will tell him the news. I see him.（用 as soon as 合并句子）
____________________________________________________________________
6. The air is getting fresher. More people choose to walk or cycle.（用 because 合并句子）
____________________________________________________________________
D. 根据汉语提示完成句子
1. 如果我们坚持回收利用，我们就能节约大量资源。
　　We can save plenty of resources ________ we ________ recycling.
2. 他一看见地上的垃圾，就会捡起来。
　　He will pick up rubbish ________ ________ ________ he ________ it on the ground.
3. 除非我们减少浪费，否则污染会更严重。
　　________ we ________ waste, pollution will become more serious.
4. 我们应该重复使用旧瓶子，因为它们可以被做成新东西。
　　We should reuse old bottles ________ they can ________ ________ ________ new things.
5. 你一到达学校，就告诉同学们关于回收的事。
　　________ ________ ________ you ________ at school, tell your classmates about recycling.
三、语篇练兵（填入合适连词：if, unless, as soon as, because）
Protecting the environment is everyone’s duty. 1.______ we hope for a clean world, we need to follow “Reduce, Reuse, Recycle”. 2.______ we cut down waste, pollution will become more serious. Many students will learn to sort rubbish 3.______ they know its importance. We can reuse old bottles 4.______ they can be made into new things. 5.______ nobody takes action, our earth will get hurt. I will take cloth bags 6.______ I go shopping. We cannot make big progress 7.______ we keep small good habits every day. We stop pouring dirty water into rivers 8.______ it pollutes fish’s home. He will tell his classmates about recycling 9.______ he returns to school. Our planet will stay beautiful 10.______ all of us work together.
附加题（用 while 或 so that 完成第 11、12 空）
11. ______ recycling is important, reducing waste should come first.
12. We sort our rubbish ______ it can be recycled more efficiently.
四、参考答案
A. 选词填空
1. if　2. Unless　3. as soon as　4. because　5. unless　6. If　7. if　8. as soon as
B. 单项选择
1. A　2. B　3. A　4. B　5. B　6. C　7. B
C. 句型转换
1. You will waste lots of wood unless you save paper.
2. He will collect litter as soon as he arrives at the park.
3. We should stop throwing rubbish into rivers because dirty water kills river animals.
4. She won’t go out unless she finishes her homework.
5. I will tell him the news as soon as I see him.
6. The air is getting fresher because more people choose to walk or cycle.
D. 根据汉语提示完成句子
1. if; keep
2. as soon as; sees
3. Unless; reduce
4. because; be made into
5. As soon as; arrive
语篇练兵
1. If　2. Unless　3. as soon as　4. because　5. If　6. as soon as　7. unless　8. because　9. as soon as　10. if
附加题
11. While　12. so that
五、要点复盘
1. 主将从现：if / unless / as soon as 引导条件或时间状语从句时，主句用一般将来时，从句用一般现在时表将来。
2. unless 自带否定：unless = if…not，从句不再加 not。
3. because 不与 so 连用：because 引导原因状语从句，so 是并列连词，二者只能选其一。
4. 2024版新增辨析：Unit 4 语法板块将状语从句与宾语从句并列复习，需注意区分：
　　状语从句说明主句动作的时间、条件、原因等，去掉后主句仍完整；
　　宾语从句充当动词（know, wonder, realize 等）的宾语，去掉后主句不完整。
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