英语高手来!!详细解答,重赏!!!!快!!!!!

我有个疑问哈
就是I think it's hard to learn English。
这个句子很常见吧
为什么有的it代替宾语后面要加's
有的没有加s,而是直接用it呢???
好吧,有一个人否定了其他的看法,还有人要发表什么嘛?

首先指出你的一个错误,i think后面接的不是定语从句,而是宾语从句,这里可以省略that.
先简单说下宾语和定语是什么意思.宾语就是一个动作的承受者.比如"他喝水."喝是动词,喝的对象是水,所以水是宾语.
i think .....后面是宾语也就好理解了,我认为...
...都是认为的内容,是补充动词内容的.用一个句子来做宾语的,叫宾语从句.同样,用一个句子来做定语的,叫定语从句.
定语就是起着形容词的作用,形容词只能修饰名词.
比如说一个高个的女孩,a tall girl
tall 用来形容girl,tall就是形容词,也可以叫tall是girl的定语.
the girl who is tall
who is tall用来修饰girl,因为是一个句子,所以叫定语从句.

再次,来回答it和it's的问题.
It's necessary to study English.
这句话是说学习英语很必要.
从中文翻译可以看出来.
主语:学习英语to study English
谓语:是is
表语:必要 necessary

可见it只是做为一种结构用的,它在句子当中没有任何意义.只是摆个样子,所以叫形式,但它处于主语的位置(在句子开头),所以叫形式主语.
所以这句话真正的主语是不定式,to study english,结构应该是:
To study English is necessary.
你用不定式替换it后,如果少了中间的is,这句话就不成立,少了谓语.

所以你可以这样来判断用不用is,如果后面的不定式(有时候是that 从句)替换it后需要is,那就不能少.

如你说的it's hard to learn English
To learn English __ hard.
中间一定要填is的.
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第1个回答  2008-02-22
I think it's hard to learn English。
是宾语从句I think (that)it's hard to learn English。(that)省略了

I think it hard to learn English。
此处it做形式宾语代替动词不定式to learn English
第2个回答  2008-02-22
's 是is的缩写,不加be动词的就不要‘s 啦!
第3个回答  2008-02-22
It is hard to learn English, I think.
I think 是插入成分。如果只用IT,就没有谓语动词了。
第4个回答  2008-02-22
think后只能接从句,没有is就不是句子了
只能说I find it hard to learn English
第5个回答  2008-02-22
如果用is,那么think后面的部分全部作为think的宾语。
如果不用is,那么it只是作为形式宾语,真正的宾语还是后面的hard to learn english

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