内容正文:
仁爱英语八下 Unit 8
语法详解与练习
一、语法点 1:后缀 -ion 构成名词
核心构词规则
1. 以 -ate 结尾的动词:去掉词尾的 -e(或 -te),再加 -ion
communicate → communicat- + -ion → communication
educate → educat- + -ion → education
create → creat- + -ion → creation
2. 其他动词:直接在词尾加 -ion
act → action
protect → protection
discuss → discussion
collect → collection
invent → invention
用法要点
这类名词多为抽象概念(不可数),少数为可数名词(如 action, invention)。
在句中可作主语、宾语、表语。
例:
作主语:Communication is important in teamwork.
作宾语:We need to take action to protect the environment.
二、语法点 2:if 条件状语从句(第一条件句)
核心结构
If + 一般现在时,主语 + 一般将来时/情态动词/祈使句
条件在前时,需加逗号;主句在前时,无需逗号。
三种常见搭配
1. If + 一般现在时,主语 + 一般将来时
例:If I get pocket money, I will save it in the bank.
2. If + 一般现在时,主语 + 情态动词(can/may/should)
例:If you save enough, you can buy a new bike.
3. If + 一般现在时,祈使句
例:If you go to the supermarket, buy some milk for me.
易错点
条件从句必须用一般现在时表将来,不能用 will。
❌ 错误:If I will have time, I will go.
✅ 正确:If I have time, I will go.
主语为第三人称单数时,动词需加 -s/-es。
例:If he comes early, we will start the meeting.
三、语法练习题
题型一:词形转换(10 题)
1. act → ___________
2. communicate → ___________
3. protect → ___________
4. discuss → ___________
5. collect → ___________
6. create → ___________
7. invent → ___________
8. educate → ___________
9. predict → ___________
10. connect → ___________
题型二:单项选择
(一)-ion 后缀名词辨析
11. The ___________ of the new app helps people work more efficiently.
A. invent B. invention C. inventing
12. We need to have a ___________ about the trip plan.
A. discuss B. discussion C. discussing
13. The ___________ of the environment is everyone’s duty.
A. protect B. protection C. protecting
14. Good ___________ can solve many problems between friends.
A. communicate B. communication C. communicating
15. The ___________ of the new museum will open next month.
A. create B. creation C. creating
16. The ___________ of stamps is his hobby for years.
A. collect B. collection C. collecting
17. The ___________ of the new policy will bring changes.
A. act B. action C. acting
(二)if 条件状语从句
18. If it ___________ tomorrow, we will stay at home.
A. rain B. rains C. will rain
19. You ___________ get good grades if you work hard.
A. can B. will can C. to can
20. If you ___________ the book, please return it.
A. finish reading B. will finish reading C. finished reading
21. ___________ you feel tired, take a rest.
A. If B. Unless C. Because
22. I will go to the party if I ___________ free.
A. am B. will be C. was
23. If you ___________ careful, you will make mistakes.
A. aren’t B. don’t C. won’t be
24. If you want to learn English well, ___________ more.
A. practice B. to practice C. practicing
25. If he ___________ time, he will help you.
A. have B. has C. will have
题型三:完成句子
26. 如果我有足够的钱,我会买一个新书包。
If I ___________ enough money, I ___________ ___________ a new schoolbag.
27. 如果你想保持健康,每天做运动。
If you want to keep healthy, ___________ ___________ every day.
28. 这个行动会帮助很多人。
This ___________ ___________ help many people.
29. 我们的交流让彼此更了解对方。
Our ___________ ___________ us understand each other better.
30. 如果明天下雨,我们就不去公园了。
We ___________ ___________ to the park if it ___________ tomorrow.
题型四:句型转换
31. We will have a picnic if the weather is fine.(改为同义句)
We ___________ have a picnic ___________ the weather is fine.
32. You should study hard. You will pass the exam.(用 if 合并)
___________ ___________ ___________ hard, you will pass the exam.
33. The action is very important.(对划线部分提问)
___________ ___________ very important?
34. If you don’t hurry, you will be late.(改为祈使句)
___________ ___________, or you will be late.
35. They communicate with each other every day.(改为名词形式)
Their ___________ ___________ each other every day is good.
四、参考答案与解析
题型一:词形转换
1. action
2. communication
3. protection
4. discussion
5. collection
6. creation
7. invention
8. education
9. prediction
10. connection
题型二:单项选择
(一)-ion 后缀名词辨析
11. B(invention 是 invent 的名词形式,表“发明”)
12. B(have a discussion 是固定搭配,表“讨论”)
13. B(protection 是 protect 的名词形式,表“保护”)
14. B(communication 是 communicate 的名词形式,表“交流”)
15. B(creation 是 create 的名词形式,表“创建”)
16. B(collection 是 collect 的名词形式,表“收藏”)
17. B(action 是 act 的名词形式,表“举措”)
(二)if 条件状语从句
18. B(条件句用一般现在时,it 是第三人称单数,动词用 rains)
19. A(can 无将来时形式,直接用原形)
20. A(条件句用一般现在时,finish doing sth 表“完成做某事”)
21. A(if 引导条件状语从句,表“如果”)
22. A(条件句用一般现在时,I 对应 be 动词 am)
23. A(careful 是形容词,前面用 be 动词 aren’t)
24. A(条件句后接祈使句,用动词原形 practice)
25. B(条件句用一般现在时,he 是第三人称单数,动词用 has)
题型三:完成句子
26. have; will buy(条件句用一般现在时,主句用一般将来时)
27. do sports(祈使句用动词原形)
28. action; will(action 是 act 的名词形式,句子用一般将来时)
29. communication; makes(communication 是 communicate 的名词形式,主语为单数,动词用 makes)
30. won’t go; rains(主句用一般将来时否定形式,条件句用一般现在时)
题型四:句型转换
31. won’t; unless(if…not 替换为 unless,表“除非”)
32. If you study(用 if 引导条件状语从句,从句用一般现在时)
33. What is(对主语 The action 提问用 what)
34. Hurry up(祈使句表“快点”,与原句逻辑一致)
35. communication with(communicate with 对应的名词形式是 communication with)
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