内容正文:
宾语从句
1. 名词性从句
在句子中起名词作用的句子叫名词性从句
名词从句的功能相当于名词词组,他在复合句中能担任主语,宾语,表语,同位语等
因此根据它在句中不同的句法功能,名词从句又可分别称为主语从句,宾语从句,表语从句和同位语从句。
2. 宾语和宾语从句的含义
1. I like you. (宾语)
宾语:动作的对象或承受者。
2. I know he likes you.(宾语从句)
宾语从句:一个句子充当主句的宾语。
3. 宾语从句的连接词
从属连词:that, if/whether(是否)
连接代词:who,whom,whose,what等
连接副词:when,where,why,how
1. 连词(引导词)
当宾语从句是陈述句时(包括肯定句和否定句),连词由that引导,因为that在从句中不作任何成分,也没有任何具体意思,因此在口语或非正式文体中常省略
She says (that) she won’t take part in the sports meeting next Sunday.
Jim thought(that) the train was like a big moving party.
宾语从句中的连词that在以下三种情况下不能省略
A. 当that从句与另一名词从句并列作宾语时,第二个that不能省
B. 当that作介词宾语时,that不可省略
C. 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.
· I think it necessary that you should read English aloud.
当宾语从句是一般疑问句时,由连词whether 或if引导,因为if/whether翻译成:“是否”,具有一定的意义,所以不能省略
· Lily wanted to know if/whether her grandma liked the bag.
· She asked me if/whether she could borrow these books.
区别“如果if 和是否if ”
如果if,引导条件状语从句,遵循主将从现等规则;是否if引导宾语从句。
I don’t know if they ___________ (come) tomorrow.
If they _______ (come)tomorrow, I will call you.
主将从现是指在时间状语从句和条件状语从句中,如果主句是一般将来时,从句用一般现在时替代一般将来时.
whether与if的辨用
· 表“是否”时,在下列情况下用whether
Whether or not 连在一起引导宾语从句时
Let me know whether or not he will come
· 在介词之后用whether
I'm interested in whether he likes English
· 在不定式前用whether
He hasn't decided whether to visit the old man
当宾语从句的特殊疑问句时,由连接代词(what,who, whom, which,whose) 或连接副词(when,where,how,why) 引导,因为连接代词或连接副词在从句中担任一定的句子成分,具有一定的意义,所以不可以省略
· Do you know what he said just now?
· I don’t remember when we arrived.
· Please tell me who(whom)we have to see.
宾从时态
主句为现在时,从句可以为任意时态
如果主句是现在的时态,从句的时态可根据具体情况而定
· I know he lives here.
· I know he lived here ten years ago.
· I have heard that he will come tomorrow.
主句为过去时,从句只能为过去某种时态
如果主句是过去的时态,那么从句的时态一定要用相对应的过去的某种时态
· I knew who lived here.
· I saw she was talking with her mother.
· He asked whether his father would come back tomorrow.
· He said that he had seen it.
从句为客观真理,只能用一般现在时
The teacher said that the earth travels around the sun.
宾从语序
宾语从句的语序用陈述语序:连接词+主语+谓语+其他成分
When will he go to the library?
His brother asks when he will go to the library.
What does he want to buy?
I don’t know what he wants to buy.
注意
1. 如果主句的谓语动词是ask时,连词不可能是that; 如果主句的谓语动词是say时,连词用that
She says that she will leave s message on his desk.
He asks if I like playing the piano.
2. 否定的转移:若主句谓语动词
为think,consider,suppose,believe,expect,guess,imagine等,其后的宾语从句若含有否定意义,一般要把否定词转移到主句谓语上,从句谓语用肯定式。
I don’t think this dress fits you well.
3. it 常可以放在动词think,find,consider,believe,feel,make等后作为形式宾语;it不仅可以 作为形式主语,还可以作为形式宾语而真正的宾语-that从句则放在句尾,特别是在带复合宾语的句子中。
I think it necessary that we take plenty of hot water every day.
4. 在表示建议 suggest , advise 要求demand 、desire、require、request、propose; 决定 decide; 命令 order、command; 坚决主张 insist; 等动词后跟宾语从句,用(should)+v.(虚拟语气)
I suggested that you(should)study hard.
He ordered that we should go out at once.
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