今天起为大家介绍一下英语中几大从句的用法以及其相关内容， 如果总结地不够详尽的， 还将从句放在句末。
常见的句型有：*lt is a fact ∖ a pity ∖ a questi On ∖good n ews that...*lt seems ∖appears ∖happe ned ∖has turned out that...∣ *lt is clear ∖importa nt ∖likely ∖possible that...*It is said ∖reported ∖estimated ∖has bee n PrOVed that...It is Said that comic books Create a Conn ecti On betwee n people of the Same gen erati on.∣It SeemS that the PerfOrma nce is Very useful.2) What 引导的主语从句表示“.的东西时” 一般不用it 作形式主语。
What We lack is experie nce.3) what,who,whe n,why,whether 等词含有各自的疑问意义，但它们引导的主语从句，都用陈 述语序。
How the pla n is to be Carried out should be discussed aga in.I did know Why I felt like crying.To be ContinU ed: 宾语从2.宾语从句1）宾语从句可位于及物动词、介词和某些形容词后。
连词 that 常可省略。
介词后一般接疑 问词引导的宾语从句。
in that （因为）,except that （除了 ）,but that （只是）已构成固定搭配，其 他介词后一般不接that 引导的宾语从句。
*I PrOmiSed that I would Cha nge the SitUation. *All this is differe nt from What AmeriCa n young people would Say about frien dship. *He is Certain that WatChing so much television is not good for ChiIdren.*This article is well-written except that it is a bit too long.2) 宾语从句后如有宾补，要用形式宾语 it 来代替，而把宾语从句移至宾补之后。
He has made it clear that he would not Cha nge his mind.3) 在think,believe,suppose,expect 等动词后的宾语从句中，如果谓语是否定的，一般将否 | 定词移至主句谓语上，宾语从句则变成肯定形式。
He did n't think that the money WaS well SPe nt.To be Continued: 表语从句3. 表语从句表语从句出现在结构为 主语+系动词+表语从句”的句子中。
表语从句除可用请各位朋友补充说明，谢谢。
—I1.主语从句1）主语从句可直接位于主语的位置，如果从句较长，谓语又较短，可用 it 作形式主语，而今天起为大家介绍一下英语中几大从句的用法以及其相关内容，如果总结地不够详尽的，还that,what,when,why,whether,how 等弓丨导外，还可由 because,as if(though) 等弓丨导。
that 常可省略。
如主句主语为 reason,只能用that引导表语从句，不可用 because.PerhaPS the most important thing to remember is that there is no one com mon type of lifein AmeriCa.The reas On Why So many people died there is that there Were not eno Ugh food supplies.It looks as if SUCCeSSfUI intern ati Onal CUItUraI com muni Cati on will make the world smaller.To be Continued: 同位语从句4. 同位语从句同位语从句用于对前面出现的名词作进一步说明，一般用连词that引导，由于先行名词的意义不同，也可用Whether,who,whe n,where,what,why,how 等引导。
常见的先行名词有fact,idea,belief, news,hope,c On clusi on, evide nce,suggesti on,order,problem,report,decisi on.有时由于谓语较短，将同位语从句位于谓语之后。
She fin ally made the decisi On that She would join the fashi On show.I had no idea how many books I could borrow at a time.The n ews Came that their team had won the ChamPi on ship.To be Continued: 定语从句5. 定语从句定语从句所修饰的先行词可以是名词或代词，也可以是一个句子。
定语从句通常位于先行词之后，由关系代词或关系副词引导。
*限制性定语从句限制性定语从句修饰先行词，对先行词起修饰作用，紧接先行词之后，无逗号，若省去，原句意思不完整。
引导定语从句的关系代词有 who,whom,whose,which,that 等。
who,whom,whose 用于指人，whose有时也可指物，相当于of WhiCh ； WhiCh用于指物；that 既可指人也可指物，但只用于限制性定语从句中。
关系代词除了引导定语从句，替代先行词外，还在从句中担任主语、宾语、定语等。
The COmPUterS and CabIeS WhiCh make UP the Internet are OWned by people and orga niz atio ns.Those who live alone or who are SiCk may have trouble in getti ng close to other people.first,last,any,few,much,some,no,only 以及形容词最高级修饰时，只能用关系代词that引导从句。
That is all that rve heard from him.He's the first PerS on that I'm going to in terview this after noon.The girl whose Pare nts died in an accide nt is liv ing With her gra ndmother.1）当先行词是 all,anything,everything,something,nothing 等不定代词或先行词前有first,last,any,few,much,some,no,only 以及形容词最高级修饰时，只能用关系代词that引导从句。
That is all that rve heard from him.He's the first PerS on that I'm going to in terview this after noon.在从句中作宾语的关系代词常可省略。
关系代词紧跟介词，作介词宾语时不可用that ,只可用WhiCh或Whom引导从句，并且不可省略，但当介词位于宾语从句句末时，作为介词宾语的关系代词仍可用that ,也可省略。
ThiS is One of those things With WhiCh We have to PUt up.ThiS is One of those things (WhiCh\that) We have to PUt UP With.3)引导定语从句的关系副词有When,where,why 等。
关系副词在从句中作状语，意义上相当于一个介词+which"的结构。
EVen in comic books Where (=in WhiCh) there are no words,the StOrieS are fully expressed through the draw in gs.No OneknoWS the reas On why（=for WhiCh） he WaS so angry that day.5.定语从句*非限制性定语从句非限制性定语从句既可修饰先行词，也可修饰整个主句，起补充说明作用，与主句之间有逗号隔开，若省去，原句意思不受影响。
不可用that引导非限制性定语从句。
关系词不可省略。
EVery ObjeCt has a gravitatiOnal pull,which is rather like magnetism.*介词whose"引导的定语从句介词whose"可引导限制性定语从句，也可引导非限制性定语从句，该结构中介词的选择取决于从句谓语动词的固定搭配，或先行词的习惯搭配。
ThiS is the COmPUter On WhiCh he SPe nt all his SaV ingsIt is Written by a PerSon With whom We are all familiar.*as引导的定语从句as引导的定语从句主要用于“such...as及”"thesame...as '的结构中，代替先行词是人或物的名词。
as引导非限制性定语从句时，代替整个主句，从句可位于主句之前、之后或中间。
TheSe are not SUCh problems as Can be easily solved.（as 代替先行词 problems）AS is men tio ned above ,no sin gle compa ny Or group Can Con trol What happe ns On the Internet.（as代替主语）To be Continued: 状语从句在从句中作宾语的关系代词常可省略。