高中英语2025届高考语法复习名词性从句知识讲解

这是一份高中英语2025届高考语法复习名词性从句知识讲解，共3页。学案主要包含了名词性从句的引导词，名词性从句的分类，that与what的用法区别，宾语从句不省略that的情况等内容，欢迎下载使用。
一、名词性从句的引导词
二、名词性从句的分类
三、that与what的用法区别
四、只用whether不用if的情况
注意：
（1）用it作形式主语把主语从句后置时，whether和if都可使用，否则只能用whether。
It hasn’t been decided yet whether/if we shall hld a meeting.
（2）从句为否定结构时一般用if不用whether。
I dn’t knw if it wn’t rain tmrrw.
五、dubt,sure后的从句的引导词
六、what,wh与whatever,whever的区别
七、宾语从句不省略that的情况
引导词
意义
例句
连词
That,if,whether,as if,because等
只起连接作用，不在从句中作任何成分。That没有具体意义；whether和if意为“是否”；as if意为“好像”；because意为“因为”。As if和because常引导表语从句
I have heard (that) he will cme back next week.
Whether she will jin us des nt matter t much.
He lks as if he is very angry.
连接代词
Which,what,wh,whm,whatever,whever等
在从句中作主语、宾语、表语或定语等。Which表示选择意义；what指物；wh和whm指人；whatever和whever表示泛指意义
I wnder wh will teach us English.
That’s what he wants.
Whatever was said here must be kept secret.
连接副词
When,why,where,hw等
在从句中分别作时间、原因、地点和方式状语等
He didn’t tell me when he wuld leave.
Hw he became rich vernight is still a puzzle.
类别
说明
例句
主语从句
“主语从句+谓语+其他成分”型
That she will cme t ur party is certain.
“It+be+形容词/名词/过去分词+主语从句”型
It is quite clear that the ear f the elephant is like a huge fan.
It is cmmn knwledge that fish can’t live withut water.
It is reprted that the plice will sn lk int the case f tw missing children.
“It+ccurs/ccurred/happens/happened等+that从句”型
It happened that he went by that stre.他碰巧经过那家商店。
宾语从句
动词的宾语从句
紧跟在及物动词后
Yu can take whatever yu think is useful.
可用it作形式宾语，而把宾语从句放在句末
I think it necessary that yu shuld pay mre attentin t yur prnunciatin.
介词的宾语从句
that引导的宾语从句一般不限在介词后。如果需要，一般先用it作形式宾语，然后再接从句
Yu may depend n it that I shall always help yu.
表语从句
引导主语从句的词都可以引导表语从句，且用法基本一样。另外表语从句还可以用because,as if,as thugh引导
The truble is that we are shrt f funds.
He has heart disease. That is because he has been smking t much.
同位语从句
后跟同位语从句的多是一些表示抽象含义的名词，如fact,hpe,idea,infrmatin,news,prblem,pssibility,prmise,suggestin,truth等
I have n idea wh will be in charge f the cmpany when the manager is away.
I did nt receive the news that the meeting had been put ff.
引导词
区别
例句
that
在从句中不作任何成分，只起连接作用，没有词汇意义
That she is a rich wman is knwn t us.
what
在从句中充当句子成分，表示一定的意义
What the teacher said had a gd effect n the children.
情况
例句
引导位于句首的主语从句时
Whether it is true remains a questin.
引导表语从句和同位语从句时
The questin is whether we shuld g n with the wrk.
引导为了强调而置于句首的宾语从句时
Whether he will cme I am nt sure.
从句作介词或discuss等的宾语时
It depends n whether it will be fine.
We discussed whether we shuld use the mney t buy a new huse.
与r nt直接连用时
I dn’t knw whether r nt he arrives.
句子中已有if引导的条件句时
He asked me whether I’d mve t New Yrk if I gt the jb.
用if容易产生歧义时
Please let me knw whether yu need help.
句型
从句引导词
例句
dubt
主句是肯定句，用if或whether
I dubt if/whether he will cme sn.
主句是否定句，用that
I never dubted that he wuld cme.
sure
sure后的从句用that
I’m sure that he can pass the exam.
Nt sure后的从句用if或whether
I’m nt sure if/whether he can help me.
区别
例句
What,wh是指具体的人或物，有特指含义
I want t knw what he has tld yu.
Wh made the call is nt imprtant.
Whatever,whever表示任何一个人或事物，有泛指含义，语气比what,wh强烈
I dn’t believe in letting children d whatever they like.
I’ll make friends with whever can share bth my jys and srrws.
情况
例句
That从句与谓语被短语、词组等分隔开时
They tld us nce again that this wuld never happen.
有多个由that引导的从句时，只有第一个从句中的that可省略
He said (that) he had finished reading this nvel and that he wuld brrw anther ne.
that引导的名词性从句与另一名词性从句作并列宾语时
Everyne culd see what was happening and that Tm was really shcked.