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动词不定式复合式中不定试的逻辑主语用of和for引出,怎么区分?

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动词不定式复合式中不定试的逻辑主语用of和for引出,怎么区分?
1.即:of sb to do sth和for sb to do sth的区别.
2.关键是看of/for前面的形容词的特点,如果它是指sb的性格/品质/品德等,就用of,不是则用for.
如:It's kind of you to help me.
It's important for you to learn English.
3.另外还有两个判定的方法:
如果该结构可以换写成sb be + 形容词 + to do sth,则用of,反之则用for.
如:
1)It's kind of you to help me.
= You are kind to help me.
2)It's important for you to learn English.
≠ You are important to learn English.这句话错误.