动词不定式的用法讲解一、动词不定式：构成：to + 动词原形 （to只是不定式符号，没有意义）动词不定式作主语较长时，常用it作形式主语，而将真正的主语放在句末。1.It + is/was+形容词+(for sb.) +动词不定式To learn English well is useful. = Its useful to learn English well. 学好英语是有用的。To protect environment is important for us.= Its important for us to protect environment. 对于我们来说保护环境是很重要的。2. It is / was + kind / good/ nice/ clever + of sb. + 动词不定式Its very kind of you to help me. 你帮助我真是太好啦。Its very clever of you to do like that. 你那样做真的太聪明啦。3. It takes ( to
