主语从句讲解练习及答案
高中英语主语从句用法练习题50题(答案解析)
高中英语主语从句用法练习题50题(答案解析)1. ____ is still unknown whether we can go back to the past through time - traveling.A. ItB. ThatC. WhatD. Which答案解析：A。
在这个句子中，“whether we can go back to the past through time - traveling”是真正的主语从句，为了避免句子头重脚轻，使用it作形式主语，这是it作形式主语的常见用法。
选项B“that”引导主语从句时无实际意义，但在此处不符合句子结构需求。
选项C“what”在主语从句中要充当成分，这里不需要。
选项D“which”表示“哪一个”，不符合句子语境。
2. ____ makes me happy is that I have passed the difficult English exam.A. ItB. ThatC. WhatD. Which答案解析：C。
这里“____ makes me happy”是主语从句，从句中缺少主语，“what”可以在主语从句中充当主语，表示“……的事物”。
选项A“it”作形式主语时，句子结构应为“it + be + 形容词+ that从句”，不符合此句结构。
选项B“that”引导主语从句时在从句中不充当成分，这里从句缺主语，所以不行。
选项D“which”表示在一定范围内的“哪一个”，不适合此语境。
3. ____ is a fact that the earth moves around the sun.A. ItB. ThatC. WhatD. Which答案解析：A。
“that the earth moves around the sun”是真正的主语从句，这里使用it作形式主语，这是典型的it作形式主语的结构，“it + be + 名词+ that从句”。
主语从句讲解练习及答案
主语从句讲解练习及答案主语从句一、主语从句的连词分三类（1）从属连词引导的主语从句（that whether if）that引导的主语从句:引导词that无含·义/在句中不做成分/不可以省。
That 引导主语从句通常用it 作形式主语。
That she survived the accident is a miracle.whether有含义(是否)/在句中不做成分/不可以省。
注意：引导主语从句，不能用if不能在开头，只能用whether。
Whether she is coming or not doesn’t matter too much.（2）用连接代词引导的主语从句在由连接代词who, whose, whom, which（哪一个）, what, whoever, whomever, whichever, whatever引导的名词性从句中，其连接代词在句中起名词性作用，担当一定成分.例如Whatever we do is to serve the people.注：whatever / whoever的功用whatever = anything that; whoever = anyone who。
要注意和whatever, whoever引导的让步状语从句的区别。
如：Whoever breaks the law should be punished. （主语从句）（＝Anyone who breaks the law should be punished. ）（定语从句）Whoever breaks the law, he should be punished. （让步状语从句）（＝No matter who breaks the law, he should be punished. ）（让步状语从句）（3）用连接副词when, where, why, how引导的名词性从句(其连接副词有含义,在句中作状语。
八年级英语主语从句练习题50题答案解析版
八年级英语主语从句练习题50题答案解析版1. ______ made her mother angry was that she didn't finish her homework.A. ItB. WhatC. WhichD. That答案解析：B。
在这个句子中，“What made her mother angry”是主语从句，在整个句子中作主语，表示“使她妈妈生气的事情”。
主语从句是在句子中充当主语的从句。
判断主语从句的关键是看这个从句是否在句子中充当主语成分。
选项A“it”在这里不能引导主语从句；选项C“which”引导主语从句时有选择的含义，在此句中不符合语义；选项D“that”引导主语从句时，在从句中不充当任何成分，而此句中需要一个在从句中充当主语的词，所以只能选“what”。
2. ______ we will go for a picnic depends on the weather.A. IfB. WhetherC. ThatD. What答案解析：B。
“Whether we will go for a picnic”是主语从句，作句子的主语，表示“我们是否去野餐这件事”。
主语从句是句子的主语部分。
判断依据是它在句子中起到主语的作用。
选项A“if”不能引导位于句首的主语从句；选项C“that”引导主语从句时，从句语义不完整；选项D“what”在从句中要充当成分，而此句中不需要，所以选择“whether”。
3. ______ is known to all, the earth is round.A. AsB. ItC. WhichD. What答案解析：A。
“As is known to all”是主语从句，在句中作主语，表示“众所周知的事情”。
判断为主语从句是因为它在句子中承担主语的职能。
选项B“it”不能这样引导主语从句；选项C“which”引导非限定性定语从句，不用于这种主语从句；选项D“what”在从句中要充当主语、宾语等成分，这里不需要，所以选“As”。
主语从句超全讲解加练习
误:ＩfMaryrｅａllyｈｅaｒdhimis reallyｄoubｔｆul.
正: Wｈｅｔｈer Marｙrｅaｌlyheａrdhｉｍｉsｒｅａlly dｏubtful.
Cｏmpｌeｔetheｓｅntｅnｃｅs usｉng whａt, wheｔhｅr,ｗｈere,wheｎ, whｏ,ｗｈｙ, hｏwｏr tｈａt.
Wｈｅnｔhey wｉlllｅａvｅiｓ ｎoｔｄecided.
Howwewillpaint thehousｅhasnｏｔbeｅｎdecｉdeｄ.
注意:
1)主语从句在句首时，必须由连接词引导,不能省略这些连接词
误:Ｔｈey should lｉｋe eaｃh other isｎatｕrａl.
正：Ｔhａt thｅyshｏuld like each othｅrｉsnａtuｒal
(Who, whom，wｈicｈ，wｈat可以和ever构成合成词,和wｈat一样引导从句，ｅｖer起到强调作用。它们在句子中担任主干成分，并用陈述句形式)
What mａnｙ ｓcｉentiｓｔsｂｅlieve istｈaｔtｈe eartｈiｓrｏunｄ…
Whoｗｉｌl taｋｅpaｒｔin theｍeeting haｓｎoｔbｅen deｃidｅｄ.
Ｉt iｓobｖiｏus thａｔ…很明显…
Iｔ ｉs necｅssary＼ｉｍｐｏrtaｎｔ\natuｒaｌ\..．tｈat…+(sｈｏulｄ)do
_＿__＿_＿_＿__＿＿__＿（很可能）shｅwillcｏme bacｋtomorrow.
*＿__＿＿_＿__＿_____＿＿(很明显)ｔhiｓmeａsurｅiｓeffectiｖｅ.
高中英语主语从句练习题20题含答案解析
高中英语主语从句练习题20题含答案解析1._____ he will come or not is still a question.A.ThatB.WhetherC.WhoD.What答案解析：B。
“Whether...or not”是固定搭配，表示“是否”。
A 选项that 在主语从句中不表示“是否”的意思；C 选项who 表示“谁”，不符合语境；D 选项what 表示“什么”，也不符合题意。
2._____ surprised us most was his attitude.A.ThatB.WhetherC.WhoD.What答案解析：D。
what 在主语从句中充当主语，表示“什么”。
A 选项that 在主语从句中无实际意义，只起连接作用；B 选项whether 表示“是否”；C 选项who 表示“谁”，在这里都不符合语境。
3._____ is known to us all is that the earth is round.A.ThatB.WhetherC.WhoD.What答案解析：A。
“That is known to us all”是固定句式，that 在主语从句中无实际意义，只起连接作用。
B 选项whether 表示“是否”；C 选项who 表示“谁”；D 选项what 表示“什么”，在这里都不合适。
4._____ he has done is very important.A.ThatB.WhetherC.WhoD.What答案解析：D。
what 在主语从句中充当宾语，表示“他所做的事情”。
A 选项that 在主语从句中无实际意义，只起连接作用；B 选项whether 表示“是否”；C 选项who 表示“谁”，在这里都不符合语境。
5._____ will win the game is not clear.A.ThatB.WhetherC.WhoD.What答案解析：C。
根据语境，“谁会赢得比赛还不清楚”，who 在主语从句中充当主语，表示“谁”。
初一英语主语从句造句练习题40题答案解析版
初一英语主语从句造句练习题40题答案解析版1. ____ that we should help each other in the class is very important.A. ItB. ThatC. ThisD. He答案：B解析：在这个句子中，“that we should help each other in the class”是主语从句，that在主语从句中不作任何成分，只起连接作用。
整个句子的结构是“主语从句（that we should help each other in the class）+系动词（is）+表语（very important）”。
2. ____ that Tom likes reading books makes his parents happy.A. ItB. WhatC. WhichD. That答案：D解析：“that Tom likes reading books”是主语从句，that起连接作用，无实际意义。
句子结构为“主语从句（（that Tom likes reading books）+谓语（makes）+宾语（his parents）+宾补（happy）”。
3. ____ that we need to do more exercise is a fact.A. ItB. ThatC. ThereD. Those答案：B解析：这里“that we need to do more exercise”是主语从句，that用于引导主语从句，在从句中不充当成分。
句子结构是“主语从句（（that we need to do more exercise）+系动词（is）+表语（a fact）”。
4. ____ that she is good at dancing is known to all.A. ItB. WhatC. ThatD. Which答案：C解析：“that she is good at dancing”为主体的主语从句，that只起连接作用。
九年级英语主语从句练习题50题含答案解析
九年级英语主语从句练习题50题含答案解析1._____ he will come or not is still a question.A.IfB.WhetherC.ThatD.What答案解析：B。
“whether...or not”是固定搭配，表示“是否”。
A 选项“if”不能与“or not”连用；C 选项“that”在主语从句中无实际意义，且不符合语境；D 选项“what”在主语从句中要充当成分，不符合题意。
2._____ surprised me most was that he passed the exam.A.WhatB.ThatC.WhichD.It答案解析：A。
“what surprised me most”中“what”在主语从句中充当主语，表示“最让我惊讶的事情”。
B 选项“that”在主语从句中无实际意义，且不符合语境；C 选项“which”在主语从句中有选择的意思，不符合题意；D 选项“it”不是引导词。
3._____ we need is more time.A.ThatB.WhatC.WhichD.When答案解析：B。
“what we need”中“what”在主语从句中充当宾语，表示“我们需要的东西”。
A 选项“that”在主语从句中无实际意义，且不符合语境；C 选项“which”在主语从句中有选择的意思，不符合题意；D 选项“when”在主语从句中表示时间，不符合题意。
4._____ is known to us all, the earth is round.A.AsB.WhatC.ThatD.Which答案解析：A。
“As is known to us all”是固定用法，意思是“众所周知”。
B 选项“what”在主语从句中要充当成分，不符合题意；C 选项“that”在主语从句中无实际意义，且不符合语境；D 选项“which”在主语从句中有选择的意思，不符合题意。
主语从句练习题及答案
主语从句练习题及答案一、主语从句练习题1. ______ is not known is whether the meeting will be held tomorrow.A. IfB. WhatC. ThatD. Which2. ______ she said surprised me a lot.A. WhatB. WhetherC. ThatD. Which3. ______ is certain is that he will stay in Paris for a year.A. WhatB. WhetherC. ThatD. Which4. ______ studying abroad is expensive, many students still choose to do so.A. WhatB. IfC. ThatD. Which5. ______ made her angry was his rude behavior.A. WhatB. WhetherC. ThatD. Which二、主语从句练习题答案1. B. What2. A. What3. C. That4. A. What5. C. That三、文章练习题主语从句是句子中的一个句子成分，用来作为句子的主语，它常常以连接代词或连接副词的形式出现。
在句子中，主语从句常常起到引导词，引导句子的作用。
以下是几个关于主语从句的练习题。
练习题1：______ is not known is whether the meeting will be held tomorrow.练习题2：______ she said surprised me a lot.练习题3：______ is certain is that he will stay in Paris for a year.练习题4：______ studying abroad is expensive, many students still choose to do so.练习题5：______ made her angry was his rude behavior.答案：1. B. What2. A. What3. C. That4. A. What5. C. That通过以上练习题，我们可以锻炼和巩固对主语从句的理解和应用能力。
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主语从句一、主语从句的连词分三类（1）从属连词引导的主语从句（that whether if）that引导的主语从句:引导词that无含·义/在句中不做成分/不可以省。
That 引导主语从句通常用it 作形式主语。
That she survived the accident is a miracle.whether有含义(是否)/在句中不做成分/不可以省。
注意：引导主语从句，不能用if不能在开头，只能用whether。
Whether she is coming or not doesn’t matter too much.（2）用连接代词引导的主语从句在由连接代词who, whose, whom, which（哪一个）, what, whoever, whomever, whichever, whatever引导的名词性从句中，其连接代词在句中起名词性作用，担当一定成分.例如Whatever we do is to serve the people.注：whatever / whoever的功用whatever = anything that; whoever = anyone who。
要注意和whatever, whoever引导的让步状语从句的区别。
如：Whoever breaks the law should be punished. （主语从句）（＝Anyone who breaks the law should be punished. ）（定语从句）Whoever breaks the law, he should be punished. （让步状语从句）（＝No matter who breaks the law, he should be punished. ）（让步状语从句）（3）用连接副词when, where, why, how引导的名词性从句(其连接副词有含义,在句中作状语。
) 例如:Where we should live is a problem.When they will come hasn’t been made public.三、it 作形式主语的主语从句有时为了考虑句子平衡，通常在主语从句处使用形式主语it，而将真正的主语从句移至句末。
这分四种情况：(1)对于以连词that引导的主语从句，通常用形式主语it替代主语从句：<a> It is +名词+从句It is a fact that…事实是……；It is good news that ………是好消息；It is a question that ………是个问题；It is common knowledge that ………是常识It is common knowledge that the whale is not a fish.It is no surprise that Bob should have won the game.<b> It is +形容词+从句It is necessary that …有必要……；It is clear that …很清楚……；It is likely that …很可能……；It is important that …重要的是……It seems obvious that we can not go on like this.It is necessary that you （should）master the computer.需要注意的是这类主语从句中，谓语动词很多为“（should）＋动词原形”，即要用虚拟语气。
<c> It is +过去分词+从句It is said that …据说……；It is reported that …据报道……；It has been proved that …已证明……；It must be proved that…必须指出……例如：It is used to be thought that a new star must be due to a collision between two stars.It has not been made clear when the new road is to be opened to traffic.<d> It seems不及物动词（happened / appears / doesn’t matter / makes no difference / occurred …）that …主语从句不可提前It makes no difference whether he will attend the meeting or not.It does not matter if I missed my train.It happened that I saw him yesterday.(2)对于以连接代词(副词)引导的主语从句，可以使用形式主语代主语从句，也可直接在句首使用主语从句：Whether they would support us was a problem. 他们是否会支持我们还是一个问题。
It was a problem whether they would support us.他们是否会支持我们还是一个问题。
(3)对关系代词型what引导的主语从句，通常直接将主语从句放在句首。
如：What we need is money. 我们需要的是钱。
What I want to know is this. 我想知道的就是这一点。
有时也可将助用形式主语。
如：It is clear enough what he meant. 他是什么意思很清楚。
(4)如果句子是疑问句，则必须用带形式主语it的结构：Is it true that he is the girl’s father? 他是那女孩的父亲，是真的吗？How is it that you are late again? 你怎么又迟到了？四、连词that的省略问题引导主语从句的连词that 有时可省，有时不能省，其原则是：若that引导的主语从句直接位于句首，则that不能省略；若that引导的主语从句位于句末，而在句首使用了形式主语it，则that可以省略：That you didn’t go to the talk was a pity. 很遗憾你没去听报告。
(that不可省)It was a pity (that) you didn’t go to the talk. 很遗憾你没去听报告。
(that可省)主语从句练习题1.________ makes mistakes must correct them.A. WhatB. ThatC. WhoeverD. Whatever2. It worried her a bit ____ her hair was turning grey.A. whileB. thatC. ifD. for3.When and why he came here ________ .A. is not knownB. are not knownC. has not knownD. have not known5. ________ Tom liked to eat was different from ________.A. That…that you had expectedB. What …that you had expectedC. That…what you had expectedD. What…what you had expected6.________ we go swimming every day ________ us a lot of good.A. If...doB. That...doC. If...doesD. That...does7.It ________ Bob drives badly.A. thinks thatB. is thought whatC. thought thatD. is thought that8.It's uncertain ________ the experiment is worth doing.A. ifB. thatC. whetherD. how9.________ the boy didn't take medicine made his mother angry.A. ThatB. WhatC. HowD. Which10.____ we can't get seems better than ____ we have.A. What, whatB. What, thatC. That, thatD. That, what11.____ you don't like him is none of my business.A. WhatB. WhoC. ThatD. Whether12..____ we'll go camping tomorrow depends on the weather.A. IfB. WhetherC. ThatD. Where13._________is going to do the job will be decided by the Party committee.A. ThatB. WhyC. HowD. Who14._______we'll finish translating the book depends on the time.A. WhenB. WhyC. WhatD. That15.______he won't go there is clear to all of us.A. HowB. WhatC. WhyD. This16.______the house will be built will be discussed at tomorrow's meeting.A. IfB. WhereC. ThatD. What17. ._______you come or not is up to you.A. WhatB. IfC. WhyD. Whether18.._______makes mistakes must correct them.A. WhoB. AnyoneC. WhoeverD. Anybody19.._______team will win the match is a matter of public concern.A. WhichB. ThatC. IfD. How20..________leaves the room last ought to turn off the lights.A. AnyoneB. The personC. WhoeverD. Who答案：1~5 CBACD 6~10DDCAA 11~15 CBDAC 16~20 BDCAC。