作者：刘文茜
1.［原句再现］You are good at talking to people. 你擅长与人交谈。
［要点解析］be good at 意为"在......方面做(学)得好；擅长于......"其中at 是介词，所以be good at后面要跟V-ing形式。
［知识拓展］be good at 后还可跟名词或代词。例如：
Irfan is good at football. 伊凡擅长踢足球。
［特别提示］be good at = do well in，因此上面所出现的句子可依次替换为：
①You do well in talking to people.
② Irfan does well in football.
2. ［原句再现］ I want to help the people who are sick. 我想要帮助那些生病的人。
［要点解析］want后跟动词不定式，意为"想要做某事"。
［知识拓展］want后还可直接跟名词或代词。例如：
I want the book. He wants it, too. 我想要这本书，他也想要。
［特别提示］want = would like, 因此上面所出现的句子可依次替换为：
① I would like to help the people who are sick.
② I would like the book. He would like it, too.
3. ［原句再现］ I hope to have a great family when I'm older. 我希望当我成年时，我能拥有一个大家庭。
［要点解析］hope后面跟动词不定式，意为"希望做某事"。
［知识拓展］hope后面还可跟that引导的宾语从句，that可省略。因此I hope to have a great family when I'm older. 可说成：
I hope (that) I can have a great family when I'm older.
［特别提示］"hope to do"形式不能随便使用。只有当主句的主语与从句的主语相同时，才可使用"hope to do"形式。