2020年高考英语语法必考知识点：名词性从句专项练习单项选择1.____knowledge comes from practice is known to all.A.WhatB.ThatC.IfD.Where2._____we go swimming every day________us a lot of good.A.If…doB.That…doC.If…doesD.That…does3.____is known to all that WTO stands for World Trade Organization.A.WhichB.WhatC.AsD.It4.____is known to everybody is that Taiwan is part of China.A．As B What C．That D It5.It's a pity_____you should have to leave.A.whetherB.thatC.whatD.when6.It is important that the students___oral English every day.A.would practiceB.practiceC.practicedD.practicing7.It is not immediately clear_____the financial crisis will soon be over.A.whatB.whetherC.sinceD.that8.____you have seen things like these before doesn't matter.A.IfB.WhetherC.WhatD.When9._____breaks the school rules will be punished.A.No matter whoB.AnyoneC.WhoeverD.One student10.____the house will be built will be discussed at tomorrow's meeting.A.IfB.WhereC.ThatD.What11.____we'll finish translating the book depends on the time.A.WhenB.WhyC.WhatD.That12._____is a fact that English is accepted as an international language.A.ThereB.ThisC.ThatD.It13._____makes the school famous is________many students in this school have been admitted to famous universities.A.What;becauseB.That;becauseC.Whether;thatD.What;that14.Water is a sign of life—water is_____makes life possible on the planet.A.thatB.whatC.itD.which15.That is____Lu Xun once lived.A.whatB.whereC.thatD.why16.I hate___when people talk with their mouths full.A.itB.thatC.theseD.them17.I like____in the autumn when the weather is clear and bright.A.thisB.thatC.itD.one18.We think____our duty that we pay taxes to our government.A.thatB.thisC.itsD.it19.Don’t____that all those who get good grades in the entrance examination will prove to be the most successful.A.take as grantedB.take this for grantedC.take that for grantedD.take it for granted20.The doctor suggested that the patient sent to hospital without delay.A.areB.isC.beD.will bekeysBDDBB BBBCB ADDBB ACDDC名词性从句指的整个句子话充当名词。
Tom tells me a story.主语宾语He is my teacher,Tom.表语同位语（teacher和Tom指的是同一个人/事）从上面两个句子中可以看出，名词在句子里可以充分主语，宾语，表语和同位语，故名词性从句包含了宾语从句，表语从句，主语从句，同位语从句四种。
A、宾语从句：整个句子充当宾语的成分，包括动宾和介宾。
Tom tells me that he is my teacher.注：1）从句：陈述句语序；2）引导词往往是从句开始的标志；1.引导词：a.连接词:1)That：从句完整（只起连接作用，不表达任何意思）+意思明确I believe that I will win the game.2)Whether…(or not):if从句完整+是否意思I don’t know whether it will rain tomorrow(or not).(天气的主语用It)I am not sure if I will go to the USA.b.连接代词what,which,who,whoever,whichever,whatever,whom,whose:从句不完整I don’t know what is right.I don’t know with whom I should go out.(介词后面用宾格形式)I don’t know who I should go out with.He is interested in whatever he sees.c.连接副词when,why,how,where从句完整，表示地点，时间，原因，方式/程度I want to know when my dad will come back.Tom wants to know how he can pass the exam.I realize how important my mother is.2.that是否可以省略1）宾语从句第一个从句的that原则上是可以省略的，但是自己写作或口语的时候建议不要省略。
2）当两个或多个that引导的宾语从句并列使用时，即使省略了第一个从句的引导词that，后面的that也不可省略。
He said it wasn’t his business and the government should do something about it.A.what;thatB.that;whatC./;thatD.that;/key:C3.whether/if的用法He asks whether/if I went shopping yesterday.I haven’t decided whether I should go.注意：if通常不用于引导主语从句或表语从句，但可以用于引导宾语从句，与whether用法相同，但是在以下情况下只能用whether：a.在介词后面；It depends on whether you can do the work well.I worry about whether I hurt her feelings.b.从句中有or not;I don’t know whether he is coming or not.c.在少数动词，如：leave,put,discuss,doubt后面；We discussed whether Mary could join us.4.宾语从句时态（1）当主句是一般现在时或一般将来时时，宾语从句可用所需的任一时态；I think that he moved to Beijing five years ago.（2）当主句是一般过去时时，宾语从句要用相应的过去时态。
He told me that he worked in that factory.She thought that her boss had been to Tokyo more than three times.（3）当宾语从句为客观事实客观真理时，时态应采用一般现在时。
The teacher said that light travels much faster than sound.5.it形式宾语当从句在某个句子中作宾语时，为保持句子结构平衡，常用it作形式宾语，而将真正的宾语放在句尾。
常用it作形式宾语情况：(1)当从句在复合宾语结构中作某些动词的宾语时（如think,make,find, consider,feel,suppose等）；They found it pleasant that they worked with us Chinese.(2)某些表示“喜、怒、哀、乐”的动词，如like,enjoy,love,hate等，往往不能直接接宾语从句；I hate it when my mother asks me to eat eggs.6.否定转移：当主句主语为第一人称，且主句谓语动词为think,believe,suppose,expect, imagine等时，若其后接一个表示否定意义的宾语从句，此时通常应将否定转移到主句上。
如：I don’t think that he will leave.I don’t believe that it is easy.注意：在表示建议、劝告、命令含义的动词后的宾语从句，谓语动词需用“should+动词原形”表示，should可省略。
常见的词有suggest,demand, insist,instruct,order,propose,recommend,request,require等。
He suggested that we(should)start off early the next day.They insisted that the boy(should)go with them.B、表语从句：整个句子充当表语成分。