新概念英语语法大全28页.docx

新概念语法精粹Guide to New Concept English Grammar第一章 英语动词时态(Tenses)英语时态是英语语法中的第一道难关，攻下此难关是作文、阅读、口语之关键。汉语用不同词表达相应时态，而英语用同一词的不同变化形式表达时态。英语各种时态构成表：以play为例：一般时态 进行时态 完成时态 完成进行时态现在play playsisam playing arehashave playedhashave been playing过去playedwas were playinghad playedhad been playing将来shall will playshallwill be playingshallwill have playedshallwill have been playing过去将来shouldwould playshould