情态动词宾语从句.doc

情态动词宾语从句,情态动词引导宾语从句,表推测的情态动词在宾语从句中,情态动词,情态动词有哪些,情态动词的用法,什么是情态动词,will是情态动词吗,情态动词后面加什么,情态动词表推测主要是must I 和may I 的否定回答
——must I …….
No, you needn’t /you don’t have to
——may I ….
No ,you mustn’t
宾语从句
用一个句子做另一个句子的宾语,将这个句子叫做宾语从句。宾语从句做介词或及物动词的宾语。现在从下列三个方面总结归纳如下:
一,引导词
A,由that 引导的陈述句性的宾语从句,在很多动词如say, think, wish , hope, see, believe, agree, expect, hear , feel等动词后。连词that只起连接作用,在从句中不做句子的成分,也无词汇意义,在口语中常被省略,但在大多数情况下还是以不省为好,特别是在笔语中。
例:I told him that he was wrong.
l在think,believe, suppose, expect等动词引起的宾语从句中,有时谓语尽管是否定意义,却不用否定形式,而将think 等动词变为否定形式。
例:I don’t think you are right. (我认为你做的不对)
l在许多带有复合宾语的句子中,that引导的宾语从句经常移到句子的后面,而用it做形式宾语。
例:We think it wrong that he told a lie to everyone (我认为他向每一个人撒谎是错误的)
B,由连词if、 whether 引导的表示“是否…”的宾语从句。Whether,if 在从句中不做句子的成分,一般情况下,whether和if 可以替换。
例:I don’t know if/whether he e tomorrow.
The teacher asked if/whether we had finished the experiment.
l在介词后面的宾语从句中不用if引导
例:Everything depends on whether we have enough money。
l宾语从句中有or not时不用if引导.
例:I don’t know whether the movie star e or not.
l和不定式连用作宾语时不用if引导.
例:Whether to go there or not hasn’t been decided.
C,由wh-引导的宾语从句。连接代词who,whom,whose, what, which,和连接副词when, where, why, how 等连接的宾语从句,它们在句中即有连接从句的作用,又在句中充当句子的成分。
例:Do you know which film they are talking about? (which做定语)
I don’t know where he lives. (where 做地点状语)
二,宾语从句的语序,
宾语从句从句的语序必须是陈述语序,既连接词+主语+谓语+其他成分
例:I believe that they e soon.
He asked me whether I was a teacher.
They wanted to know what they can do for us.
二,宾语从句的时态。
宾语从句的时态受主句的限制,
既:主句是一般现在时态,从句根据实际情况而定。
主句是一般过去时态,从句用相应的过去的时态。如果从句的动作发生在主句之前,则从句要用过去完成时态。
例:
1)She says that she is a student.
She said that she was a student.
2)She says that she will fly to Japan in a week.
She said that she would fly to Japan in a week.
3)She says that she has finished her homework already.
She said that she had finished her homework already.
4)She says that she can sing a song in English.
She said that she could sing a song in English.
l如果宾语从句说的是客观真理、自然现象或事实时,这时宾语从句要用一般现在时态。
例:The teacher said that the earth goes