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somestudentsfeelthepressuretodowellintheirlessons1这里一定要用todo吗,请问todo后面做什么结构,后置定语吗,能不能用doing做定语,区别是?什么时候用不定式做定语;2as表倍数时使用方法,比如twice
题目详情
some students feel the pressure to do well in their lessons
1这里一定要用to do 吗,请问to do后面做什么结构,后置定语吗,能不能用doing做定语,区别是?什么时候用不定式做定语;
2as 表倍数时使用方法,比如twice the risk as they?对吗,只有一个as的,表什么方面的几倍怎么说
1这里一定要用to do 吗,请问to do后面做什么结构,后置定语吗,能不能用doing做定语,区别是?什么时候用不定式做定语;
2as 表倍数时使用方法,比如twice the risk as they?对吗,只有一个as的,表什么方面的几倍怎么说
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答案和解析
1、
不定式作后置定语,修饰pressure;不能直接用doing作定语,因为feel后面接的宾语pressure与doing没有逻辑上的主谓或动宾关系,不是pressure doing也不是doing the pressure.
例如:
I saw him doing his homework when I passed his window.
主谓关系,him和doing存在逻辑上的主谓关系,是him doing
We all found his equipment interesting. (主表关系)
I saw Mary going upstairs then. (主谓关系)
以上例句,都是现在分词在句中作宾语补足语,这时现在分词和前面的宾语有逻辑上的关系
现在分词短语作【定语】放在所修饰词的后面,意思同【定语从句】差不多.
例如 :
Tell the children playing outside not to make too much noise. = Tell the children who are playing outside not to make too much noise.
关于区别:
动词不定式常表示未来的动作,所以叫不定式.动名词则表示经常性或已经发生的动作
例如:
He stopped to do speak to me.(未发生,将要发生)
He stopped speaking to me.(已发生)
什么时候用不定式作定语:
一句话说不清,你看下这里,也许会有点帮助:
http://wenku.baidu.com/view/2c255d4fe518964bcf847ccc.html
2、twice the risk as they是不对的,前后比较的不一致
你可以说:We have twice the risk as they do.
as 用来表示倍数,有下列几种用法:
A is 倍数+as +形容词原级+as B
A is 倍数+the size/width/height/length of B
例如:
His uncle is twice as old as he.
The bag is twice the size of that one.
注意:A和B 须是同等成分,如果A是名词,B也同样要是;其他,亦成立!
不定式作后置定语,修饰pressure;不能直接用doing作定语,因为feel后面接的宾语pressure与doing没有逻辑上的主谓或动宾关系,不是pressure doing也不是doing the pressure.
例如:
I saw him doing his homework when I passed his window.
主谓关系,him和doing存在逻辑上的主谓关系,是him doing
We all found his equipment interesting. (主表关系)
I saw Mary going upstairs then. (主谓关系)
以上例句,都是现在分词在句中作宾语补足语,这时现在分词和前面的宾语有逻辑上的关系
现在分词短语作【定语】放在所修饰词的后面,意思同【定语从句】差不多.
例如 :
Tell the children playing outside not to make too much noise. = Tell the children who are playing outside not to make too much noise.
关于区别:
动词不定式常表示未来的动作,所以叫不定式.动名词则表示经常性或已经发生的动作
例如:
He stopped to do speak to me.(未发生,将要发生)
He stopped speaking to me.(已发生)
什么时候用不定式作定语:
一句话说不清,你看下这里,也许会有点帮助:
http://wenku.baidu.com/view/2c255d4fe518964bcf847ccc.html
2、twice the risk as they是不对的,前后比较的不一致
你可以说:We have twice the risk as they do.
as 用来表示倍数,有下列几种用法:
A is 倍数+as +形容词原级+as B
A is 倍数+the size/width/height/length of B
例如:
His uncle is twice as old as he.
The bag is twice the size of that one.
注意:A和B 须是同等成分,如果A是名词,B也同样要是;其他,亦成立!
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