如何区分英语四大从句

1、名词性从句名词性从句主语从句主语从句宾语从句宾语从句表语从句表语从句同位语从句同位语从句主语从句主语从句?连接词连接词uthat引导的主语从句：引导的主语从句：1. It is + adj. (obvious, true, natural, surprising, wonderful, funny, possible, certain, ect.) + that 从句从句It is certain that she will do well in her exam.that that 是否可以省略是否可以省略? ?That she will do well in her exam is cer

2、tain. ( )that that 在句首时绝对不能省在句首时绝对不能省. .口语中口语中thatthat引导真正的主语时引导真正的主语时,that,that可省可省. . 2. It is + 名词词组名词词组（no wonder, a good thing, a pity, no surprise, ect.) + that 从句从句Its a pity that we cant go.that that 是否可以省略是否可以省略? ?That we cant go is a pity. ( )that that 在句首时绝对不能省在句首时绝对不能省. .口语中口语中thatthat引导

3、真正的主语时引导真正的主语时,that,that可省可省. . 3. It is + 过去分词过去分词（ said, reported, thought, expected, decided, announced, arranged, ect.) + that 从句从句It is decided that the meeting has been put off till next Monday.that that 是否可以省略是否可以省略? ?that that 在句首时绝对不能省在句首时绝对不能省. .口语中口语中thatthat引导真正的主语时引导真正的主语时,that,that可省可省

4、. . That the meeting has been put off till next Monday is decided. ( )主语从句主语从句uthat 引导的主语从句引导的主语从句that that 置于句首时绝对不能省置于句首时绝对不能省, ,口语中口语中thatthat引导真正的主语引导真正的主语时时,that,that可省可省. . _ the meeting will be given is still a problem. It is doubtful _ he will come here.Whetherwhether/ if主语从句放于句首，只能用主语从句放于句首

5、，只能用whetherwhether当当it it 作形式主语，主语从句放在句末时用作形式主语，主语从句放在句末时用whether whether 或或if if 均可。均可。翻译翻译:uwhether / if引导的主语从句引导的主语从句明天是否开会仍然是个问题明天是否开会仍然是个问题. .他是否会来这还令人怀疑他是否会来这还令人怀疑. .?主语从句主语从句uthat 引导的主语从句引导的主语从句uwhether / if引导的主语从句引导的主语从句that that 一般不能省一般不能省主语从句放于句首，只能用主语从句放于句首，只能用whether当当it 作形式主语，主语从句放在句末作形

6、式主语，主语从句放在句末时用时用whether 或或if 均可。均可。u特殊疑问词引导的主语从句特殊疑问词引导的主语从句It makes no difference _ we shall have the meeting.whereIt has not been decided yet _ will president over the meeting.who主语从句主语从句uthat 引导的主语从句引导的主语从句uwhether / if引导的主语从句引导的主语从句u特殊疑问词引导的主语从句特殊疑问词引导的主语从句uwhat, wh- ever 引导的主语从句引导的主语从句What they

7、 need is a good textbook.Whoever did this job must be rewarded.他们需要的是一本好课本他们需要的是一本好课本. .无论谁干了这件工作一定要得到酬谢无论谁干了这件工作一定要得到酬谢. .翻译翻译: :主语从句主语从句uthat 引导的主语从句引导的主语从句uwhether / if引导的主语从句引导的主语从句u特殊疑问词引导的主语从句特殊疑问词引导的主语从句uwhat, wh-ever 引导的主语从引导的主语从句句宾语从句宾语从句?连接词连接词请说出以下句子请说出以下句子that 是否可省略是否可省略Do you know that

8、he has joined the army?( ) Im sure that he will pass the exam.( ) adj. adj. 的宾语的宾语We think it highly probable that he is dead.由由it it 作形式宾语时，作形式宾语时，that that 引导的真正宾语中，引导的真正宾语中， that that 不可省略。不可省略。uthat that 引导的宾语从句：引导的宾语从句：宾语从句宾语从句uthat 引导的宾语从句引导的宾语从句一般可省一般可省由由it 作形式宾语时，作形式宾语时，that 引导引导的真正宾语中，的真正宾语

9、中， that 不可省不可省略。略。I dont care _ he doesnt come.I dont care _ he comes or not.I dont care _ or not he comes.I dont know _ to go there.It depends on _ you can do the work well.whetheruwhether / if引导的宾语从句引导的宾语从句ifwhether / ifwhetherwhether宾语从句为否定句时用宾语从句为否定句时用if if介词后只能用介词后只能用whetherwhetherwhether + to

10、dowhether + to dowhether or notwhether or notwhether / ifwhether / ifor not ( or not ( 口语中有时用口语中有时用 if )if )宾语从句宾语从句uthat 引导的宾语从句引导的宾语从句uwhether / if引导的宾语从句引导的宾语从句u特殊疑问词引导的宾语从句特殊疑问词引导的宾语从句I cant imagine how he did it.We are worrying about what we should do next.作介词宾语作介词宾语陈述语序陈述语序宾语从句宾语从句uthat 引导的宾语从

11、句引导的宾语从句uwhether / if引导的宾语从句引导的宾语从句u特殊疑问词引导的宾语从句特殊疑问词引导的宾语从句uwhat, wh-ever 引导的宾语从句引导的宾语从句We shall not forget when ( = the time when ) the meeting will open.She will give whoever (= anyone who) needs help a warm support.She walked up to where (= the place where) he stood.宾语从句宾语从句uthat 引导的宾语从句引导的宾语从句u

12、whether / if引导的宾语从句引导的宾语从句u特殊疑问词引导的宾语从句特殊疑问词引导的宾语从句uwhat, wh-ever 引导的宾语从引导的宾语从句句表语从句表语从句?连接词连接词 My decision is that all of us are to start at 6 oclock tomorrow morning.uthat 引导的表语从句引导的表语从句that that 是否可以省略是否可以省略? ?表语从句表语从句uthat 引导的表语从句引导的表语从句uwhether / if引导的表语从句引导的表语从句The problem is whether the meeti

13、ng will be given.此时的此时的whether 是否可以用是否可以用if 替换替换?表语从句表语从句uthat 引导的表语从句引导的表语从句uwhether 引导的表语从句引导的表语从句u特殊疑问词引导的表语从句特殊疑问词引导的表语从句My question how I shall get in touch with him had not been answered.表语从句表语从句uthat 引导的表语从句引导的表语从句uwhether 引导的表语从句引导的表语从句u特殊疑问词引导的表语从句特殊疑问词引导的表语从句uWhat, wh-ever 引导的表语从句引导的表语从句Th

14、is is where our problem lies.表语从句表语从句uthat 引导的表语从句引导的表语从句uwhether 引导的表语从句引导的表语从句u特殊疑问词引导的表语从句特殊疑问词引导的表语从句uwhat, wh-ever 引导的表语从引导的表语从句句uas if/ as though, because, why 引导的表引导的表语从句语从句It looked as if it was going to rain.That was why I asked for three days leave.Thats because he didnt work hard enough.b

15、ecause because 引导的表语从句引导的表语从句, ,主语能不能是主语能不能是reason reason 或或cause?cause?because because 是否可以换成是否可以换成since, as since, as 引导引导表语从句表语从句? ?表语从句表语从句uthat 引导的表语从句引导的表语从句uwhether 引导的表语从句引导的表语从句u特殊疑问词引导的表语从句特殊疑问词引导的表语从句uwhat, wh-ever 引导的表语从引导的表语从句句uas if/ as though, because, why 引导的表语从句引导的表语从句同位语从句同位语从句?连接词

16、连接词uthat 引导的同位语从句引导的同位语从句Theres a feeling in me that well never know what a UFO is not ever.连词连词that 引导同位语从句时引导同位语从句时, 应在某些抽象名词应在某些抽象名词之后之后,如如: fact, hope, desire, thought, suggestion, idea, news, problem, possibility等等, 对前面的名词起补充说明的作用对前面的名词起补充说明的作用.?that that 在同位语从句中是否做成分在同位语从句中是否做成分? ?that that 是否

17、能省略是否能省略? ?同位语从句同位语从句uthat 引导的同位语从句引导的同位语从句uwhether 引导的同位语从句引导的同位语从句I have no idea _ the meeting will be given.whether?此处是否可以用此处是否可以用if?if?我不知道会是否要开我不知道会是否要开. .同位语从句同位语从句uthat 引导的同位语从句引导的同位语从句uwhether 引导的同位语从句引导的同位语从句u特殊疑问词引导的同位语从句特殊疑问词引导的同位语从句My question how I shall get in touch with him had not be

18、en answered.同位语从句同位语从句uthat 引导的同位语从句引导的同位语从句uwhether 引导的同位语从句引导的同位语从句u特殊疑问词引导的同位语从句特殊疑问词引导的同位语从句uwhat, wh-ever 引导的同位语从句引导的同位语从句I gave the girl a big doll, exactly what she longed to have.同位语从句同位语从句uthat 引导的同位语从句引导的同位语从句uwhether 引导的同位语从句引导的同位语从句u特殊疑问词引导的同位语从句特殊疑问词引导的同位语从句uwhat, wh-ever 引导的同位语引导的同位语从句从句Revision名名词词性性从从句句主语从句主语从句宾语从句宾语从句表语