宾语从句中引导词的用法主要想问that,when,which,where等等引导词的用法这些我一直搞不懂~还有what和how在句中的区别是什么？

宾语从句中引导词的用法主要想问that,when,which,where等等引导词的用法这些我一直搞不懂~还有what和how在句中的区别是什么？
宾语从句中引导词的用法
主要想问that,when,which,where等等引导词的用法
这些我一直搞不懂~
还有what和how在句中的区别是什么？

宾语从句中引导词的用法主要想问that,when,which,where等等引导词的用法这些我一直搞不懂~还有what和how在句中的区别是什么？
在复合句中作主句的宾语,引导词有：
连词：that (that 常可省略),whether,if
代词：who,whose,what ,which
副词：when ,where,how,why 等.
（一）that引导的宾语从句（在非正式场合that可以省略）
可跟that从句做宾语的动词有：
say,think,insist,wish,hope,demand,imagine,wonder,know,suppose,see,believe,agree,admit,deny,expect,explain,order,command,feel,dream,suggest,hear,mean,notice,prefer,request,require,propose,declare,report等.
例句：The boy believes that he will travel through space to other planets.
注意事项：当主句谓语动词是 think,believe,suppose,expect 等词,而宾语从句的意思是否定时,常把否定转移至主句表示.
例句：I don’t think it is right for him to treat you like that.
在以下情况中that不能省略
1.当句中的动词后接多于两个由that引导的宾语从句时,第一个that可省,但后面的that不可省.
例句：He said (that) you were too young to understand the matter and that he was asked not to tell you.
2.当主句的谓语动词与that宾语从句之间有插入语时,that一般不可省.
例句：Just then I noticed,for the first time,that our master was wearing his fine green coat and his black silk cap.
3.当that从句是双宾语中的直接宾语时,that不可省.
例句：I can’t tell him that his mother died.
注意事项：许多带复合宾语的句子,that引导的宾语从句经常移到句子后部,而用it作形式宾语.
例句：I find it necessary that we should do the homework on time.
（二）由whether,if 引导的宾语从句
由whether(if)引导的宾语从句,实际上是一般疑问句演变而来的.意思是“是否”.宾语从句要用陈述句语序.一般说来,在宾语从句中whether与if可以互换使用,但在特殊情况下if与whether是不能互换的.
例句：I wonder whether(if) they will come to our party.
只能用whether,不能用if引导的宾语从句
1.在带to的不定式前
例句：We decided whether to walk there.
2.在介词的后面
例句：I’m thinking of whether we should go to see the film.
3.在动词后面的宾语从句时
例句：We discussed whether we had a sports meeting next week
4.直接与or not连用时
例句：I can’t say whether or not thet can come on time.
只能用if不能用whether引导的宾语从句
1.if引导条件状语从句,意为“如果”
例句：The students will go on a picnic if it is sunny.
2.if引导否定概念的宾语从句时
例句：He asked if I didn’t come to school yesterday.
3.引导状语从句even if（即使）和as if（好象）时
例句：He talks as if he has known all about it.
（三）连接代词和连接副词引导的宾语从句
这样的宾语从句实际上是由特殊疑问句变化而来的,宾语从句要用陈述句语序.用于这种结构的动词常常是：see,say,tell,ask,answer,know,decide,show,find out,imagine,suggest,doubt,wonder,discover,understand,inform,advise等.
英语中的连接代词有：who,whom,whose,which,what,在句中担任主语、宾语、定语或者表语.
例句：Can you tell me whom you are waiting for?
英语中的连接副词有：when,where,why,how,在句中担任状语的成分.
例句：None of us knows where these new parts can be bought.

Although it rained, they had a good time. 定语从句 定语从句（Attributive Clauses）在句中做定语，修饰一个名词或代词，有时也可以修饰部分或整个句子。 被修饰的名词,词组或代词即先行词。定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。 关系代词有：who, whom, whose, that, which，as 。 关系副...

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Although it rained, they had a good time. 定语从句 定语从句（Attributive Clauses）在句中做定语，修饰一个名词或代词，有时也可以修饰部分或整个句子。 被修饰的名词,词组或代词即先行词。定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。 关系代词有：who, whom, whose, that, which，as 。 关系副词有：when, where, why ,how 。 关系代词和关系副词放在先行词和定语从句之间，起连接作用，同时又可做定语从句的一个成分。当关系代词做宾语时可以省略。 定语从句中的谓语动词必须在人称上和数量上和先行词保持一致。 定语从句分为限制性定语从句和非限制性定语从句。 1 、关系代词引导的定语从句 1）who, whom, that 这些词代替的先行词是人的名词或代词，在从句中所起作用如下： Is he the man who/that wants to see you?（who/that在从句中作主语） He is the man whom/ that I saw yesterday.（whom/that在从句中作宾语） 2) Whose 用来指人或物，(只用作定语, 若指物，它还可以同of which互换), 例如： They rushed over to help the man whose car had broken down. Please pass me the book whose (of which) cover is green. 3)which, that 它们所代替的先行词是事物的名词或代词，在从句中可作主语、宾语等，例如： A prosperity which / that had never been seen before appears in the countryside.（which / that在句中作宾语） The package (which / that) you are carrying is about to come unwrapped. (which / that在句中作宾语) 关系代词that和which 都可以指物，that 和Who 都可以指人，其用法区别： 1）不用that的情况 a) 在引导非限定性定语从句时 (错) The tree, that is four hundred years old, is very famous here. b) 介词后不能用 We depend on the land from which we get our food. c)多用who 的情况 ①关系代词在从句中做主语 A friend who helps you in time of need is a real friend . ②先行词为those , people 时 Those who were either fools or unfit for their offices could not see the cloth . ③先行词为all, anyone , ones , one 指人时 One who doesn’t work hard will never succeed in his work . ④在There be句型中 There is a stranger who wants to see you . ⑤在被分隔的定语从句中 A new teacher will come tomorrow who will teach you German . ⑥在有两个定语从句的句子中，其一用who,其二用that,但若先行词后接两个以上的并列定语从句时，后一个必须重复前一个关系代词。 The student who was praised at the meeting is the monitor that is very modest and studies very hard . There is a teacher who is always ready to help others and who enjoys what he does . 2) 只能用that作为定语从句的关系代词的情况 a) 在不定代词，如：anything, nothing, everything, all, much, few, any, little等作先行词时，只用that，不用which。 All that is needed is a supply of oil. Finally, the thief handed everything that he had stolen to the police. b) 先行词有the only, the very, the just修饰时，只用that。 He is the very man that helped the girl out of the water . c) 先行词为序数词(the last)、数词、形容词最高级时，只用that。. The first English book that I read was “The Prince and the Pauper” by Mark Twin . d) 先行词既有人，又有物时。 He talked about the teachers and schools that he visited . e)当主句是以who 或which 开始的特殊疑问句时，用that 以避免重复。 Who is the person that is standing at the gate .

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