关于important 的to 和for 我们都知道一个固定句型：It's important for sb to do sth .那么to do sth调到前面做主语呢?TO do sth is important for sb?to sb?用哪个?理由?谢

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关于important 的to 和for 我们都知道一个固定句型：It's important for sb to do sth .那么to do sth调到前面做主语呢?TO do sth is important for sb?to sb?用哪个?理由?谢
关于important 的to 和for
我们都知道一个固定句型：It's important for sb to do sth .
那么to do sth调到前面做主语呢?
TO do sth is important for sb?to sb?用哪个?理由?谢

关于important 的to 和for 我们都知道一个固定句型：It's important for sb to do sth .那么to do sth调到前面做主语呢?TO do sth is important for sb?to sb?用哪个?理由?谢
To do sth is important for sb 是对的,因为这句话的意思是“做什么事对某人来说是重要的”,而“对某人来说”只能用介词“for”.另外,It's important for sb to do sth这个句型本来就是从To do sth is important for sb 这个句子演变而来的,由于用不定式“to do sth”做主语显得头重脚轻,所以我们用it 作形式主语,句子改变为It's important for sb to do sth,实际上真正的主语还是to do sth.

为平衡句子，最好用it 做形式主语。
用for sb, sb是逻辑主语。

如果提前的话ms用doing代替to do
sb前面用to，表指向

To do 放在句首做主语是可以的，后面应该接for sb。我们说的It's important for sb to do sth 实际上是it在做形式主语，而真正的主语是后面的to的不定式，这样做的目的就是为了避免头重脚轻。而你现在把to do放到句首，只是改变了顺序，没有语法错误，但显得不地道。同样，知识改变顺序，该用for的还是用for。那doing sth is important fo...

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To do 放在句首做主语是可以的，后面应该接for sb。我们说的It's important for sb to do sth 实际上是it在做形式主语，而真正的主语是后面的to的不定式，这样做的目的就是为了避免头重脚轻。而你现在把to do放到句首，只是改变了顺序，没有语法错误，但显得不地道。同样，知识改变顺序，该用for的还是用for。

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for sb啦

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