课件7张PPT。名词性从句容易出现的错误1 单数谓语
2 whether和if的区别
3 主语从句和强调句型的区别
4 关系代词和副词的区别
5 同位语和定语从句的区别
6 主语从句的变化句型
7 可以省略的引导词 Whether and if
If 不能用在句首(主语,表语,同位语从句)
表示:是。。还是不。。。和。。。还是。。。等转折意思的时候,只能用whether。。。or not。
Whether 可以带有to do不定式短语,但是if 不能
Whether 可以放在介词后面,但是if不能
Corrections Exercise:
If she likes the present is not clear to me。
I don’t know if to see the doctor today。
She always thinks of if she can do more for the people。
Can you tell me that there’s a book store near here?
I doubt if you can give that to me or not。
whetherwhether
名词性从句与虚拟语气
名词性从句经常出现在用来表示一个并非事实,假想的虚拟语气中。为便于我们复习,现归纳如下:
一、虚拟语气中的主语从句。常见的句型有:
1.It is/was+形容词+that+主语(从句)+(should)+动词原形…… 常用在该句型中的形容词有:很自然他会这样想。
It is natural that he(should)think so.
规划应该认真筹备有必要。
It was necessary that the plan(should) be planned carefully.
advisable,amazing,astonishing,clear,certain,desirable,
important, interesting,impossible,normal,natural,necessary,
obvious, sad,surprising,strange,unusual,wonderful 等,如:
2.It is /was +名词(词组)+that+主语(从句)+(should)+动词原形…… 常用在该句型中的名词(词组)有:
(1)表示“惊奇、怀疑、遗憾”等意义的名词词组。如:a fact,a good thing,good news,a shame,a pity,a wonder,no wonder,no surprise,common knowledge 等,如:
他能这样说真的很遗憾。
It is a pity that she(should)say so.毫无疑问他会通过考试的。
It was no wonder that he(should) pass the exam.
(2)表示“请求、命令、建议、决心”等意义的名词。如:advice,demand,decision,insistence,order,proposal,requirement, request,suggestion 等,如:
It is my suggestion that we(should) get everything ready tonight.
It was her order that the matter(should)be discussed at the next meeting. 3.It is /was +动词过去分词+ that+主语(从句)+(should)+动词原形……
用在该句型中的动词过去分词表示“请求、命令、建议”等意义。如:advised,asked,begged,desired,decided,declared,demanded,insisted,discussed,offered,ordered,proposed,requested, recommended,required,suggested 等,如:
二、虚拟语气中的表语从句与同位语从句。某些表示“建议、请求、命令”等意义的名词后的表语从句或同位语从句需用“(should)+动词原形”构成谓语。这类名词有:advice,desire,decision, idea,order,plan,proposal,recommendation,request,suggestion等,如:
We agree to his idea that we(should)put on a short play at the party.
应要求,离老师应该在聚会上表演It is requested that Miss Li(should) give a performance at the party.建议每个学生唱个歌。It was suggested that each student(should)sing a song.他推荐我们坐火车去那里。
His recommendation is that we(should)go there by train.
另外,as if/as though 引导的表语从句,谓语动词用:过去时表示与现在事实相反;过去完成时表示与过去事实相反。如:
You look as if/though you were ill.
We feel as if/though we had witnessed the whole thing.
三、虚拟语气中的宾语从句。某些表示“愿望、请求、建议、命令、决心”等意义的动词后的宾语从句需用“(should)+动词原形”构成谓语。这类动词有:advise,ask,decide,command,demand,insist,order,propose,request,require,recommend,suggest, urge等,如:
The teacher suggested that we(should)have a meeting.
He orders that we(should)takepart in the activity.
动词 wish 后的宾语从句,若表示不能实现的愿望,谓语动词用过去时表示与现在事实相反的愿望;用过去完成时表示与过去事实相反的愿望;用“would /could /might+动词原形”表示与将来可能发生的事情相反的愿望。如:
I wish I knew English.
I wish I had seen you yesterday.
I wish I could fly to the moon one day.