英语八大时态讲解与练习一般现在时, 一般过去时，一般将来时，现在进行时，过去进行时，将来进行时，现在完成时, 过去完成时1. 一般现在时表示一般性，经常性的动作或一般性事实。(1)含有be动词的句子一般肯定句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.(2)不含有be
