Unit 6When was it invented单元固定短语具体用法讲义 人教版九年级英语全册

人教版英语九年级6单元固定短语具体用法讲义
固定短语具体用法；
1. such a great invention：表示“如此伟大的一项发明”。例如：This new technology is such a great invention that it has changed our lives completely.
2. be used for：意为“被用于”，后面接名词或动名词。例如：This tool is used for cutting wood.
3. by accident：意思是“偶然；意外地”。例如：I found this book by accident in a small bookstore.
4. fall into：可以表示“落入；陷入”。例如：The ball fell into the hole.
5. some time：“一段时间”的意思。例如：I need some time to finish this project.
6. less than：“少于；不到”。例如：There are less than ten students in the class.
7. take place：发生；出现；举行。例如：The concert will take place next week.
8. in the 19th century：“在 19 世纪”。例如：This building was built in the 19th century.
9. without doubt：“毫无疑问”。例如：He is without doubt the best player on the team.
10. at a low price：“以低价”。例如：We bought this house at a low price.
11. translate…into…：把……翻译成……。例如：Can you translate this sentence into Chinese
12. all of a sudden：“突然；猛地”。例如：All of a sudden, the sky became very dark.
13. by mistake：“错误地；无意中”。例如：I sent the email to the wrong person by mistake.
14. in the end：“最后”。例如：In the end, they succeeded in solving the problem.
15. more than：“多于；超过”。例如：She has more than ten years of work experience.
16. divide…into…：把……分成……。例如：The teacher divided the class into four groups.
17. at the same time：“同时”。例如：She can watch TV and read a book at the same time.
18. stop…from doing：“阻止……做……”。例如：We need to stop him from making the same mistake again.
19. dream of：“梦想；向往”。例如：He always dreams of becoming a famous singer.
20. the number of：……的数量（谓语动词用单数）。例如：The number of students in our school is increasing.
21. more and more：“越来越……”。例如：The weather is getting more and more hot.
22. look up to：“钦佩；仰慕”。例如：Many young people look up to these successful entrepreneurs.
23. take notes：“记笔记”。例如：It's a good habit to take notes in class.
24. be used to do sth.：“被用于做某事”。例如：This machine is used to produce plastic products.
25. lead to：“导致；导向”。例如：Excessive drinking can lead to health problems.
26. It is said that + 从句：“据说……”。例如：It is said that he is a very talented writer.
27. It is believed that + 从句：“人们认为……”。例如：It is believed that climate change is a serious problem.
28. ask sb. (not) to do sth.：“要求某人(不要)做某事”。例如：The teacher asked the students not to talk in class.
29. teach sb. to do sth.：“教某人做某事”。例如：My parents taught me to be honest.
30. encourage sb. to do sth.：“鼓励某人做某事”。例如：The coach always encourages us to try our best.
二、练习题和详细讲解：
1. Such a great invention! It has changed our life so much. The underlined part "Such a great invention" is a(n) ______.
A. subject B. object C. predicate D. attributive
讲解：本题考查句子成分。“Such a great invention”在句中作主语，subject 表示“主语”，object 表示“宾语”，predicate 表示“谓语”，attributive 表示“定语”。所以答案选 A。
2. The knife is used ______ cutting things.
A. for B. to C. as D. in
讲解：本题考查 be used for 的用法。be used for doing sth. 表示“被用于做某事”，是固定用法。所以答案选 A。
3. The accident happened ______. We all didn't expect it.
A. by accident B. by mistakes C. in accident D. on mistake
讲解：本题考查 by accident 的用法。by accident 表示“偶然；意外地”，符合句意。by mistake 表示“错误地；无意中”，in accident 和 on mistake 都不是固定搭配。所以答案选 A。
4. The little girl fell ______ the hole and couldn't get out.
A. into B. off C. behind D. below
讲解：本题考查 fall into 的用法。fall into 表示“落入；陷入”，符合句意。fall off 表示“从……掉下来”，fall behind 表示“落后”，below 表示“在……下面”。所以答案选 A。
5. I have been in Shanghai for ______.
A. some time B. sometimes C. some times D. anytime
讲解：本题考查 some time 的用法。some time 表示“一段时间”，for some time 表示“有一段时间了”，符合句意。sometimes 表示“有时候”，some times 表示“几次”，anytime 表示“任何时候”。所以答案选 A。
6. There are ______ students in our class than in theirs.
A. less B. fewer C. more D. much
讲解：本题考查比较级。than 是比较级的标志，less 是 little 的比较级，用于不可数名词；fewer 是 few 的比较级，用于可数名词；more 是 much/many 的比较级。students 是可数名词，根据句意“我们班的学生比他们班的少”，所以答案选 B。
7. The sports meeting will ______ next week.
A. take place B. happen C. hold D. start
讲解：本题考查 take place 的用法。take place 表示“发生；举行”，多指有计划、有安排的事情发生，常用于会议、比赛等；happen 表示“发生”，多指偶然或意外发生的事情；hold 表示“举行”，常用于举办会议、展览等；start 表示“开始”。根据句意“运动会将在下周举行”，所以答案选 A。
8. In the ______, people didn't have cars.
A. 19th century B. 19th centuries C. 19 centuries D. 1900 century
讲解：本题考查世纪的表达法。“in the + 序数词 + century”表示“在……世纪”，序数词要用单数形式。所以答案选 A。
9. There is no doubt that he is a good student. The underlined part means "______".
A. Not sure B. No problem C. Certainly not D. Without doubt
讲解：本题考查doubt 的用法。There is no doubt that... 表示“毫无疑问……”，相当于 Without doubt。Not sure 表示“不确定”，No problem 表示“没问题”，Certainly not 表示“当然不”。所以答案选 D。
10. The book is very cheap. It is sold ______.
A. at a low price B. at high price C. in a low price D. in high price
讲解：本题考查 at a low price 的用法。at a low price 表示“以低价”，in price 表示“在价格方面”，high/low 都用来修饰 price。根据句意“这本书很便宜，它以低价出售”，所以答案选 A。
11. Can you translate this sentence ______ Chinese
A. into B. for C. in D. to
讲解：本题考查 translate...into...的用法。translate...into...表示“把……翻译成……”，是固定搭配。所以答案选 A。
12. All of a sudden, the lights in the room went out. It means "______".
A. Suddenly B. Quickly C. Soon D. At once
讲解：本题考查 all of a sudden 的同义短语。all of a sudden 表示“突然；猛地”，suddenly 也表示“突然”，二者意思相近。quickly 表示“快速地”，soon 表示“不久”，at once 表示“立刻；马上”。所以答案选 A。
13. I took your umbrella by mistake. I'm very sorry. The underlined part means "______".
A. with mistake B. without mistake C. by accident D. on purpose
讲解：本题考查 by mistake 的同义短语。by mistake 表示“错误地；无意中”，by accident 也表示“偶然；意外地”，二者意思相近。with mistake 和 without mistake 都不是固定搭配，on purpose 表示“故意地”。所以答案选 C。
14. In the end, we found the way to the park. The underlined part can be replaced by "______".
A. At last B. At first C. At once D. All in all
讲解：本题考查 in the end 的同义短语。in the end 表示“最后”，at last 也表示“最后”，二者意思相近。at first 表示“首先”，at once 表示“立刻；马上”，all in all 表示“总的来说”。所以答案选 A。
15. The number of the students in our class ______ 40.
A. are B. is C. were D. was
讲解：本题考查 the number of 的用法。the number of 表示“……的数量”，谓语动词用单数形式。根据句意“我们班学生的数量是 40”，句子陈述的是一个事实，用一般现在时态，所以答案选 B。