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外研版八年级下册英语（新教材）Unit 5 Looking into nature
宾语从句专项提优练习
一、什么是宾语从句
定义: 在主句中充当宾语的从句，就叫宾语从句。
简单理解：用一个完整句子，来作另一个句子的宾语。
主句结构：主语 + 谓语动词 + 宾语（从句）
1. I know you are right.
我知道你是对的。画线部分是宾语从句
2. She says she likes English.
她说她喜欢英语。画线部分是宾语从句
二、由that引导的宾语从句
1. that 含义：无实际词义，只起连接作用。
2. 用法：从句是陈述句时，用that引导。
3. 省略规则：口语/日常句中that常省略；正式书面语、从句较长时一般不省。
He thinks (that) it is easy.
他认为这很简单。（that可省）
I believe (that) she will come.
我相信她会来。
常见搭配动词：think, believe, say, know, hope, find 等。
三、宾语从句的否定前移
规则:主句主语为第一人称(I/we)，谓语动词是 think, believe, suppose, expect 时：
从句的否定，要移到主句上（否定前移），从句用肯定形式。
正确例句
1. 我认为他不对。
I think he isn't right.
I don't think he is right.
2. 我们相信她不会迟到。
We don't believe she will be late.
注意
主句主语不是I/we，不用否定前移：
He thinks I am not wrong.（正确）
四、if / whether 引导宾语从句（表“是否”）
从句是一般疑问句，改为宾语从句时，用 if / whether 引导，语序变回陈述语序。
含义：是否，二者大部分情况可互换。
1. Do you know if/whether he is at home
你知道他是否在家吗？
2. I wonder if/whether she likes music.
我想知道她是否喜欢音乐。
if 和 whether 必须区分的5种情况（只用whether，不用if）
1. 从句前面有介词时
I'm thinking whether we can go.（介词后只用whether）
2. 与 or not 连用（尤其or not紧跟其后）
I don't know whether he will come or not.
3. 放在不定式 to do 前
She doesn't know whether to leave.
4. 引导主语从句、表语从句（不在宾语从句范畴，了解即可）
5. 正式书面文体，优先用 whether
宾语从句专项练习
一、用that/ whether/if 填空。
1. I know ______ he is a good student.
2. She doesn’t know ______ her mother will come back or not.
3. We believe ______ they will win the game.
4. Could you tell me ______ the train leaves at 8:00
5. I wonder ______ he can pass the exam.
6. He says ______ he will help us with our English.
7. I’m thinking about ______ we should go there by bus.
8. She hasn’t decided ______ to take part in the party.
9. Do you know ______ the meeting will start on time
10. We all know ______ the sun rises in the east.
11. He doesn’t know ______ his father will buy him a new bike.
12. I hope ______ you can have a good time here.
13. The teacher asked ______ we had finished our homework.
14. She is worried about ______ she can finish the work on time.
15. I don’t care ______ you like me or not.
二、单项选择题。
( )1. I believe ______ he will come to the party tomorrow.
A. that B. if C. whether D. what
( )2. She doesn’t know ______ her brother will come back or not.
A. if B. whether C. that D. when
( )3. I ______ think he ______ right.
A. don’t; is B. do; isn’t C. don’t; isn’t D. do; is
( )4. We wonder ______ we should wait for him here.
A. that B. whether C. what D. how
( )5. He says ______ he will visit his grandparents this weekend.
A. / B. if C. whether D. why
( )6. I’m thinking about ______ we can go to the park this afternoon.
A. if B. whether C. that D. how
( )7. I don’t expect they ______ finish the difficult work today.
A. won’t B. don’t C. will D. can’t
( )8. Could you tell me ______ the library opens every day
A. that B. if C. whether D. both B and C
( )9. She hasn’t decided ______ to go to Shanghai with her friends.
A. if B. whether C. that D. what
( )10. We all know ______ the earth goes around the sun.
A. whether B. if C. that D. /
( )11. The teacher told us ______ light travels faster than sound.
A. if B. whether C. that D. what
( )12. I don’t know ______ he will come to the meeting or not.
A. if B. whether C. that D. when
( )13. He ______ think I ______ wrong.
A. doesn’t; am B. does; am not
C. doesn’t; am not D. does; am
( )14. She asked me ______ I had seen her keys anywhere.
A. that B. whether C. what D. where
( )15. We hope ______ you can join us in the game.
A. that B. if C. whether D. when
( )16. I’m not sure ______ he will be free this Sunday.
A. that B. whether C. what D. which
( )17. He thinks ______ it is easy to learn English well.
A. that B. if C. whether D. what
( )18. They are talking about ______ they will hold a sports meeting next week.
A. if B. whether C. that D. what
( )19. She doesn’t know ______ to say at the meeting.
A. if B. whether C. what D. how
( )20. I believe ______ you will make great progress if you work hard.
A. that B. if C. whether D. when
三、把下面句子改成宾语从句。
1. He is honest. I think.
→ I think ______ ______ ______ honest.
2. She will come to the party. I believe.
→ I believe ______ ______ ______ come to the party.
3. Will they go to the zoo We wonder.
→ We wonder ______ ______ ______ go to the zoo.
4. Is he at home Could you tell me
→ Could you tell me ______ ______ ______ at home
5. The sun is bigger than the moon. The teacher told us.
→ The teacher told us ______ the sun ______ bigger than the moon.
6. He won’t pass the exam. I think.（改为否定前移）
→ I ______ ______ he ______ pass the exam.
7. Will she accept the gift I don’t know.
→ I don’t know ______ ______ ______ accept the gift.
8. They are having a meeting. He says.
→ He says ______ ______ ______ having a meeting.
9. Can he finish the work on time We are not sure.
→ We are not sure ______ ______ ______ finish the work on time.
10. She will not be late. We suppose.（改为否定前移）
→ We ______ ______ she ______ be late.
11. Does he like playing basketball I want to know.
→ I want to know ______ ______ ______ playing basketball.
12. The earth goes around the sun. Everyone knows.
→ Everyone knows ______ the earth ______ around the sun.
13. Should we go by train They are talking about.
→ They are talking about ______ ______ ______ go by train.
14. He will not join us. I expect.（改为否定前移）
→ I ______ ______ he ______ join us.
15. Is there a bank near here Can you tell me
→ Can you tell me ______ ______ ______ a bank near here 一、用that/whether/if填空（15小题）答案与解析
1. that
解析：从句为陈述句，用that引导，that无实义，仅起连接作用。
2. whether
解析：后有or not，固定搭配whether...or not，只能用whether。
3. that
解析：从句为陈述句，用that引导。
4. if/whether
解析：表“是否”，动词后无特殊限制，if和whether可互换。
5. if/whether
解析：wonder（想知道）后接表疑问的从句，用if/whether。
6. that
解析：从句为陈述句，that可省略。
7. whether
解析：介词about后只能用whether，不能用if。
8. whether
解析：不定式to do前，只能用whether，构成whether to do结构。
9. if/whether
解析：表“是否”，无特殊限制，if和whether通用。
10. that
解析：从句为客观真理（太阳东升），用that引导。
11. if/whether
解析：表“是否”，动词后通用if/whether。
12. that
解析：hope后接陈述句从句，用that引导。
13. if/whether
解析：ask后接表疑问的从句，用if/whether。
14. whether
解析：介词about后只能用whether。
15. whether
解析：后有or not，只能用whether。
二、单项选择题（20小题）答案与解析
1. A. that
解析：从句为陈述句，用that引导。
2. B. whether
解析：后有or not，只能用whether。
3. A. don’t; is
解析：主句主语I+think，从句否定前移，主句否定、从句肯定。
4. B. whether
解析：wonder后表“是否”，用whether。
5. A. /
解析：陈述句从句，that可省略。
6. B. whether
解析：介词about后只能用whether。
7. C. will
解析：expect+第一人称，否定前移，主句已否定，从句用肯定。
8. D. both B and C
解析：无特殊限制，if和whether均可表“是否”。
9. B. whether
解析：不定式to do前，只能用whether。
10. C. that
解析：客观真理，用that引导。
11. C. that
解析：客观真理（光比声快），用that引导。
12. B. whether
解析：后有or not，只能用whether。
13. A. doesn’t; am
解析：主句主语非I/we，不用否定前移，从句直接否定。
14. B. whether
解析：ask后表“是否”，用whether。
15. A. that
解析：hope后陈述句从句，用that引导。
16. B. whether
解析：not sure后表“是否”，用whether。
17. A. that
解析：think后陈述句从句，用that引导。
18. B. whether
解析：介词about后只能用whether。
19. C. what
解析：say后缺宾语，用what（什么）引导，非if/whether。
20. A. that
解析：陈述句从句，用that引导。
三、把下面句子改成宾语从句（15小题）答案与解析
1. that he is
解析：陈述句变宾语从句，用that引导，语序不变。
2. that she will
解析：陈述句变宾语从句，that引导，时态不变。
3. if/whether they will
解析：一般疑问句变宾语从句，用if/whether，陈述语序，保留将来时。
4. if/whether he is
解析：一般疑问句变宾语从句，if/whether引导，陈述语序。
5. that; is
解析：客观真理，that引导，从句时态不变（一般现在时）。
6. don’t think; will
解析：I+think，否定前移，主句否定，从句肯定。
7. if/whether she will
解析：一般疑问句变宾语从句，if/whether引导，陈述语序。
8. that they are
解析：陈述句变宾语从句，that引导，时态不变（现在进行时）。
9. if/whether he can
解析：一般疑问句变宾语从句，if/whether引导，情态动词不变。
10. don’t suppose; will
解析：We+suppose，否定前移，主句否定，从句肯定。
11. if/whether he likes
解析：一般疑问句变宾语从句，if/whether引导，主语三单，谓语likes。
12. that; goes
解析：客观真理，that引导，从句一般现在时，主语三单，谓语goes。
13. whether we should
解析：介词about后，只能用whether，陈述语序。
14. don’t expect; will
解析：I+expect，否定前移，主句否定，从句肯定。
15. if/whether there is
解析：一般疑问句变宾语从句，if/whether引导，there be句型陈述语序。

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