问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。