英语语法：例1：I think it's necessary that we learn English well. 例

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英语语法：例1：I think it's necessary that we learn English well. 例2：I think it necessary that
we learn English well.
哪个句子正确?为什么?教材说是例2正确,而且还含多个此类型句子

两个句子都正确,但it's necessary to do , it's natural to do/that,更完整些,it是形式主语.
I think it necessary that,是形容词necessary后置,类似的有I have time enough that/to do.
这两个例子是不同语法结构的表达方式..
再问：平时见的都是主谓表+省略that的宾从，这个句型没见过，分解理解不看主句，宾语从句该转化成什么？
再答： it's necessary that we learn English well I think (that) it's necessary
再问： it's necessary that we learn English well 是例1的分解我想知道的是例2的分解没有了系动词会变成什么的句式
再答： I think it (to be) necessary....直接宾语it+to be + adj/n，通常省略to do... 如：Most people though him (to be) innocent。当直接宾语后面不是名词时，用it + adj + that/to do。。。
再问： Most people though him innocent.不是作补语吧？例：I find her attractive. attractive就是作her的补语
再答： Most people thought him (to be) innocent。 I find her (to be) attractive，这是完整的句式，可以看作是宾语补语。直接宾语+to be+ adj/n，通常省略to be。当直接宾语后面不是名词时，用it + adj + that/to do。

I think it necessary to learn english well.同义句 It's necessary to learn English well. We think that it's important for us to learn English well .W I think that it's a bit difficult for me to learn English we It‘s necessary for us___(learn)English well说明原因 l think it important that we should learn english well这句话对么? It's difficult___(learn)english well,but I think it's___(fun 1 I think _______ that we study English well ( ) I think it hard to learn English well if we don't work hard I think it to learn English well if we don'twork hard.的分析 I think——（this,that,it）is very useful to learn english well. I think that it is important to learn English well.(同义句转换)