新概念第一册主要语法知识12页.docx

新概念一主要语法知识点（一）时态主要涉及的时态有：一般现在时，现在进行时，一般过去时，现在完成时，一般将来时，过去进行时，过去完成时，过去将来时1. 一般现在时表示一般性，经常性的动作或一般性事实。 含有be动词的句子例：He is a teacher. The girl is very beautiful. Tim and Jack are students.变疑问句将be动词移到句首例：Is he a teacher? Is the girl very beautiful? Are Tim and Jack students?变否定句在be动词后面加not例：He is not a teacher. The girl is not very beautiful. Tim and Jack are not students.肯定回答及否定回答例：Yes, he is. No, he is not. Yes, sh