精选优质文档-倾情为你奉上英语时态语法（现在进行时，一般过去时，过去完成时，现在完成时，一般将来时）一现在进行时：表示现在正在进行的动作构成：主语+be动词+动词的现在分词+其他成分We are having lunch.He is reading a book.The dog is running after a cat.The boys are swimming across the river.变疑问句将be动词移动到句首Are we having lunch?Is he reading a book?Is the dog running after a cat?Are the boys swimming across the river?变否定句在be动词后面加notWe are not having lunch.He is not reading a book.The dog is not running after a cat.The boys are swimming across the
