Unit 5 Looking into nature 语法:宾语从句讲义 + 专项训练 - 2025-2026学年外研版八年级下册英语(新教材)

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Unit 5 Looking into nature 语法:宾语从句讲义 + 专项训练 - 2025-2026学年外研版八年级下册英语(新教材)

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宾语从句讲义+专项训练 答案及解析
一、用that、whether或if填空
1. that
解析:从句为陈述句,that引导宾语从句,无实义、可省略。
2. whether
解析:空格后紧跟or not,固定只能用whether,不能用if。
3. whether
解析:空格前为介词about,介词后引导宾语从句,只能用whether。
4. that
解析:从句为陈述句,that引导宾语从句,可省略。
5. where
解析:答语对应地点,用疑问词where引导特殊疑问类宾语从句。
6. whether/if
解析:从句表“是否”,相当于一般疑问句,二者可互换。
7. that
解析:从句为陈述句,that引导宾语从句,可省略。
8. whether/if
解析:从句表“是否”,相当于一般疑问句,二者可互换。
二、选择填空
1. A. that
解析:从句为陈述句,用that引导,that无实义、可省略。
2. A. if; will start
解析:第一空表“是否”,用if;第二空tomorrow morning表将来,用一般将来时will start。
3. C. what
解析:like best后缺宾语,用疑问词what(什么)引导。
4. D. will rain; rains
解析:第一空宾语从句,tomorrow表将来,用will rain;第二空if引导条件状语从句,遵循“主将从现”,用rains。
5. A. is; will rain
解析:第一空if引导条件状语从句,“主将从现”,用is;第二空宾语从句,表将来,用will rain。
6. D. whether
解析:空格后有or not,固定用whether。
7. C. whether people have sixth sense
解析:宾语从句用陈述语序,排除B;表“是否”用whether/if,排除D;描述客观事实用一般现在时,排除A。
8. D. whether
解析:空格后有or not,固定用whether。
9. A. that
解析:从句为陈述句,用that引导。
10. B. that; rises; sets
解析:从句为客观真理,用that引导;客观真理永远用一般现在时,主语the sun为三单,谓语用rises和sets。
11. C. who
解析:talk to后缺人作宾语,用疑问词who(谁)引导。
12. B. whether
解析:空格后有or not,只能用whether。
13. B. whether
解析:空格前为介词about,介词后只能用whether。
14. B. whether
解析:空格后接动词不定式to go,只能用whether。
15. A. that
解析:从句为陈述句,用that引导。
16. D. when
解析:答语为时间(At 8:00 tomorrow morning),用疑问词when(何时)引导。
三、句型转换
1. The scientist said that the earth goes around the sun.
解析:主句为过去时,从句为客观真理,时态不变;陈述句用that引导。
2. Tom asked me whether/if I would go to the park with him.
解析:一般疑问句变宾语从句,用whether/if;主句过去时,will变would;you变I,me变him。
3. I don’t think he is right.
解析:think引导宾语从句,否定前移,否定词don’t放主句,从句用肯定句。
4. I want to know whether/if she likes playing the piano.
解析:一般疑问句变宾语从句,用whether/if;从句用陈述语序,主语she为三单,like变likes。
5. My sister told me that she had finished her homework.
解析:陈述句用that引导;主句过去时,从句现在完成时变过去完成时(have finished→had finished);I变she,my变her。2026春季新版八年级下册外研版Unit 5 Looking into nature 语法讲义
Grammar:宾语从句精讲精练
在复合句中作宾语的句子叫宾语从句,通常由that、whether/if或疑问词(如what、where、why等)引导,位于动词、介词、形容词后。本单元主要学习that和whether/if引导的宾语从句。
①由that引导的宾语从句
当宾语从句是陈述句时,用that引导,that无词义,在从句中不充当成分,在口语或非正式文体中常省略。
All the students think (that) Mr. Zhang is very humorous. 所有的学生都认为张老师非常幽默。
特别提醒
如果主句谓语动词表示的是“认为,相信,猜测”等概念,如:think、guess、believe、suppose等时,宾语从句若要表达否定含义,通常要将否定转移到主句上来,即“否定前移”。
I don’t think we have met. 我想我们没见过面吧。
②由whether/if引导的宾语从句
当宾语从句的语意相当于一个一般疑问句时,常用whether/if引导,表示“是否”。whether/if在句中不充当句子成分,但不能省略。
I wonder whether/if you want to attend the meeting. 我想知道你是否想参加这个会议。
拓 if 和 whether 的用法及区别:
一般情况下,二者没有区别,可以互换。if常用于口语中,whether比较正式。但在以下几种情况中,两者不能互换。
(1) 其后紧跟or not时,只能用whether,不能用if。
Nobody knows whether or not it will rain tomorrow. 没有人知道明天是否会下雨。
(2) 在介词后只能用whether,不能用if。
The boy worries about whether he has broken his mother’s heart. 男孩担心他是否伤了妈妈的心。
(3) 与动词不定式连用时,只能用whether,不能用if。
I can’t decide whether to go or stay. 我不能决定是走还是留。
宾语从句专项练习(含答案)
一、用that、whether或if填空
1. I think ______ he will come to the party tomorrow.
2. She doesn’t know ______ her mother will like the gift or not.
3. We are talking about ______ we should have a meeting this afternoon.
4. He says ______ he has never been to Beijing before.
5. Could you tell me ______ you are from
6. I wonder ______ I can pass the English exam.
7. They believe ______ they can finish the work on time.
8. The teacher asked ______ we had read the book.
二、选择填空。
( )1.She told me ________ she bought a new dress in the shop yesterday.
A.that B.if C.when D.where
( )2.—Could you tell me ________ the meeting ________ tomorrow morning
—I need to make a schedule.
A.if; will start B.that; starts C.when; start D.where; will starts
( )3.I want to know ________ you like best about the Spring Festival.
A.that B.if C.what D.where
( )4.—How’s the weather tomorrow I don’t know if it ________ tomorrow.
—Well, if it ________, I won’t go out with you.
A.will rain; will rain B.rains; rains
C.rains; will rain D.will rain; rains
( )5.—Let’s go fishing if it ________ fine this weekend.
—But nobody knows if it ________.
A.is, will rain B.will be, rains
C.will be, will rain D.is, rains
( )6.I don’t know ______ he is right or not.
A.that B.what C.if D.whether
( )7.I’m not sure ________.
A.if people had sixth sense B.does people have sixth sense
C.whether people have sixth sense D.that people have sixth sense
( )8.All of us doubt ________ he can finish the work on time or not.
A.why B.how C.that D.whether
( )9.I think ________ English is one of the most important subjects.
A.that B.if C.what D.where
( )10.—The teacher told us ________ the sun ________ in the east and ________ in the west.
—It’s an objective truth.
A.if; rises; sets B.that; rises; sets C.that; rose; set D.whether; rise; set
( )11.Do you know ________ Mr. Wang talked to in the office just now I need to ask him some questions.
A.that B.if C.who D.what
( )12. I don’t know ______ he will come to the party or not.
A. if B. whether C. that D. what
( )13. He is thinking about ______ he should accept the invitation.
A. if B. whether C. that D. when
( )14. She decided ______ to go to the movies with her friend.
A. if B. whether C. that D. when
( )15. I think ______ he is a good student.
A. that B. whether C. if D. what
( )16. —Do you know ______ he will arrive
—At 8:00 tomorrow morning.
A. that B. whether C. if D. when
三、句型转换。
1. “The earth goes around the sun.” The scientist said.(改为宾语从句)
_____________________________________________________________
2. “Will you go to the park with me ” Tom asked me.(改为宾语从句,用whether/if)
_____________________________________________________________
3. I think he is right.(改为否定句,注意否定前移)
_____________________________________________________________
4. “Does she like playing the piano ” I want to know.(改为宾语从句)
_____________________________________________________________
5. “I have finished my homework.” My sister told me.(改为宾语从句)
_____________________________________________________________

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