高二英语情态动词否定用法练习题20题含答案解析

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高二英语情态动词否定用法练习题20题含答案解析
1.You mustn't talk loudly in the library.
A.can talk loudly
B.should talk loudly
C.may talk loudly
答案解析：图书馆里禁止大声说话，mustn't 表示禁止。

A 选项可以大声说话，与题干不符；B 选项应该大声说话，也不符合图书馆的规定；C 选项可以大声说话，同样错误。

2.You can't eat in class.
A.must eat in class
B.should eat in class
C.may eat in class
答案解析：课堂上不能吃东西，can't 表示不能。

A 选项必须在课堂上吃东西，错误；B 选项应该在课堂上吃东西，错误；C 选项可以在课堂上吃东西，错误。

3.You shouldn't be late for school.
A.must be late for school
B.can be late for school
C.may be late for school
答案解析：上学不应该迟到，shouldn't 表示不应该。

A 选项必须迟到，错误；B 选项可以迟到，错误；C 选项可以迟到，错误。

4.You needn't do all the homework in one day.
A.must do all the homework in one day
B.should do all the homework in one day
C.may do all the homework in one day
答案解析：你不必在一天内做完所有作业，needn't 表示不必。

A 选项必须在一天内做完所有作业，错误；B 选项应该在一天内做完所有作业，错误；C 选项可以在一天内做完所有作业，错误。

5.You may not take the book out of the library without permission.
A.must take the book out of the library without permission
B.should take the book out of the library without permission
C.can take the book out of the library without permission
答案解析：未经允许你不可以把书带出图书馆，may not 表示不可以。

A 选项必须未经允许把书带出图书馆，错误；B 选项应该未经允许把书带出图书馆，错误；C 选项可以未经允许把书带出图书馆，错误。

6.You mustn't play mobile games during the exam.
A.can play mobile games during the exam
B.should play mobile games during the exam
C.may play mobile games during the exam
答案解析：考试期间禁止玩手机游戏，mustn't 表示禁止。

A 选项可以在考试期间玩手机游戏，错误；B 选项应该在考试期间玩手机游戏，错误；C 选项可以在考试期间玩手机游戏，错误。

7.You can't leave the classroom without the teacher's permission.
A.must leave the classroom without the teacher's permission
B.should leave the classroom without the teacher's permission
C.may leave the classroom without the teacher's permission
答案解析：没有老师的允许不能离开教室，can't 表示不能。

A 选项必须没有老师允许就离开教室，错误；B 选项应该没有老师允许就离开教室，错误；C 选项可以没有老师允许就离开教室，错误。

8.You shouldn't copy others' homework.
A.must copy others' homework
B.can copy others' homework
C.may copy others' homework
答案解析：不应该抄袭别人的作业，shouldn't 表示不应该。

A 选项必须抄袭别人的作业，错误；B 选项可以抄袭别人的作业，错误；
C 选项可以抄袭别人的作业，错误。

9.You needn't buy a new book if you already have one.
A.must buy a new book if you already have one
B.should buy a new book if you already have one
C.may buy a new book if you already have one
答案解析：如果你已经有一本书了，就不必再买一本，needn't 表示不必。

A 选项必须再买一本，错误；B 选项应该再买一本，错误；
C 选项可以再买一本，错误。

10.You may not use your phone in the meeting.
A.must use your phone in the meeting
B.should use your phone in the meeting
C.can use your phone in the meeting
答案解析：开会时不可以使用手机，may not 表示不可以。

A 选项必须在开会时使用手机，错误；B 选项应该在开会时使用手机，错误；C 选项可以在开会时使用手机，错误。

11. In the field of art, a great painter can't have created masterpieces without years of practice.
A. mustn't
B. couldn't
C. shouldn't
D. needn't
答案解析：B。

这句话的意思是在艺术领域，一位伟大的画家不可能在没有多年练习的情况下创作出杰作。

“couldn't have done”表示对过去事情的否定推测，符合语境。

“mustn't”表示禁止；“shouldn't”表示不应该；“needn't”表示不必。

12. With the rapid development of technology, we can't assume that all problems will be solved easily.
A. mustn't
B. couldn't
C. shouldn't
D. won't
答案解析：D。

这句话说随着科技的快速发展，我们不能假设所
有问题都会很容易地被解决。

“won't”表示将来的否定推测，在这里符合语境。

“mustn't”表示禁止；“couldn't”表示过去的否定推测；“shouldn't”表示不应该。

13. In history, some events can't have happened the way we think.
A. mustn't
B. couldn't
C. shouldn't
D. mightn't
答案解析：B。

在历史中，一些事件不可能以我们认为的方式发生。