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1、名词性从句,名词性从句,主语从句,宾语从句,表语从句,同位语从句,主语从句在句中做- 宾语从句在句中做- 表语从句在句中做- 同位语从句在句中-,主语,宾语,表语,同位语,1. That he will come is certain.,2. I know that he will come.,3. The truth is that I have been there.,4. The fact that she was late surprised us.,为什么叫名词性从句？ _,整个从句相当于一个名词,比较:,The man looked around. That the boy fai
2、led again in the exam disappointed his mother.,同样作主语，从句可以表示较复杂的含义,一般是个动作或性质,I know him. I know that he is writing his composition in his room,2. 为什么要有名词性从句？,那人看了看四周. (名词作主语),那孩子考试又不及格令他母亲很失望. (从句作主语),我知道他在房间里写作文.,从句的特征:,是一个句子,有一个引导词,引导词做从句的一个成分 (that 除外),名词能做的成分,从句都能做,从句表达的意思比名词复杂得多,主语从句,that whethe
3、r who whom whose what which when where why how,从 句 引导词:,1. That he knows Japanese is known to all.,他懂英语,这一点大家都知道,令我惊讶的是在这儿见到他.,3. When he will come is unknown .,4. Whether he is coming doesnt matter much.,他来不来没什么要紧的,他什么时候来不清楚.,他们是怎么登上山顶的仍是个秘密.,5. It remains a secret how they climbed up the mountain.
4、,主语从句的位置 1.在句首 2.主语较长时通常放在后面,句首主语用 It,主语太长了!放到句尾,That无词义,不可省略,What “什么”, “所.的”,2. What surprised me was to see him here .,When “什么时候”,主语从句不用 if,位于句首,It 作主语的常用句型有:,1. It + be +形容词 + that 从句,2. It + be +名称词组(duty/pity) + that 从句,3. It + be + 过去分词(said/thought) + that 从句,4. It +不及物动词(seem/happen) + tha
5、t 从句,It is a pity that we cant go swimming.,It is said that he told her everything.,It happened that I was out that day.,It is certain that he will do well in the exam.,真可惜我们不能去游泳. 碰巧那天我外出了. 他考试肯定会考好. 据说他已告诉了她一切.,注意: It looked that he was right. ( ) 可以说: It looks as if.,happen只有 it 句型,It is said只有 i
6、t 句型,More,用形式主语 it 的主语从句常见结构,It is clear (necessary, important, possible,remarkable that 很清楚（必要, 重要,可能, 值得注意等),It is a fact (a good thing, good news) that 事实是 ( 好事是,好消息是),It is well-known ( reported, recorded, estimated,said, believed) that众所周知( 据报道,据记载,据说,据估计),It turns out ( seems, happens, appears
7、) that 结果是 ( 似乎是, 碰巧是, 好象是),It has been found (has been proved,can be seen,must be pointed out) that 已发现( 已证明,可以看出,需指出),用 it 句型翻译:,据说今年高一学生要学新教材. 事实是他们靠自己完成了所有的任务. 碰巧他们已经参加过军训了. 众所周知, 比尔 盖茨是世界上最富有的人. 我们应该养成好的学习习惯这很重要.,It is said that the Senior Grade one students will learn a new text this year.,It
8、is a fact that they finished all the work by themselves.,It happened that they had had their military training.,It is well-known that Bill Gates is the richest person in the world.,It is important that we (should) form a good habit of studying.,Note: It is important/necessary/natural/our duty/essent
9、ial/strange that sb (should) do sth. 固定句型, should可以省略,翻译: 真奇怪他今天竟然迟到了.,It is strange that he should be late today.,strange不省略should为好,表语从句,1. The truth is that he has never been to the countryside.,2. The question is whether w can finish the experiment by Friday.,3. It looks as if it were going to r
10、ain.,实际情况是他从未去过农村. that 一般不省略,问题在于我们能否在明天下午之前完成这项实验. 表语从句不用 if,4. This school is no longer what it was before.,这所学校已不再是从前的那个样子了. what =the thing that,More,系动词后面,注意下列表语从句中where, how, why 的译法,This is where Lu Xun once lived. That was how they won the match. This is why she got up so early this morning
11、.,这就是鲁迅曾经住过的地方.,他们就是这样赢得这场比赛的.,这就是她为什么今天早上起得这么早的原因.,我们就是这样克服困难的. 那就是他昨天缺席的原因. 这就是我们上星期碰头的地方.,This is / That was how we overcame the difficulties.,That is why he was absent yesterday.,This is where we met last Sunday.,This is 总是现在时That is 表示性质 That was 指过去动作,固定句型: This is where This is why This is ho
12、w.,这就是的地方,这就是的原因,这就是的方法,宾语从句中的连接词that在以下三种情况下不能省略： （1）当that 从句与另一名词性从句并列作宾语时，第二个that不能省； （2）当that作介词宾语时，that不可省掉。 （3）用it做形式宾语的宾语从句 Everyone knew what happened and that she was worried. The reason lies in that she works harder than the others do.,宾语从句,whether与if的辨用,表“是否”时，在下列情况下用whether。 a. 主语从句 b. 表
13、语从句 c. 同位语从句 e. 介词后的宾语从句 f.后接动词不定式 (whether to do sth.) g .whether or not 连在一起引导宾语从句时不用if,1).whether和if都可以引导宾语从句 a当whether后紧跟or not时,不用if. eg: I dont know whether or not I will stay. b.介词后面的宾语从句不能用if. eg: I worry about whether I hurt her feeling.,2.注意 whether和if的使用区别,Practice time,if / whether 1. I
14、asked her _ she had a bike. 3. Were worried about _ he is safe. 4. I dont know _ he is well or not. 5. I dont know _ or not he is well. 8. I dont know _ to go.,if / whether,whether,whether /if,whether,whether,I doubt if / whether he will pass the exam. I dont doubt that we will win the match. Do you
15、 doubt that he did it on his own?,doubt问题,肯定句中用 if / whether,否定句中用 that,疑定句中用 that,I doubt _he is telling the truth. We never doubt _ the plan will be carried out . Does he doubt _ you are from Austria? Im doubtful _ he will agree to this.,if / whether,that,that,if / whether,同位语从句,被修饰词有: fact, news, hope, opinion, order, question, problem, belief, truth, theory, decision, discovery, conclusion, promise, rumor, fear, thought, suggestion, plan, idea,同位语从句说明它们的内容,常见引导词: that , whether ( if ), how, wh- 疑问词,The fact that deeds are better than words is quite clear. The ques
