共享知识 分享快乐一时态：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。u 含有be动词的句子 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notHe 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Yes, he is. No, he is not. Yes, she is. No, she is not.Yes, they are. No, they are not.
