助动词do-doesdid-和be动词am-is-are用法的区别(共2页).doc

精选优质文档-倾情为你奉上助动词do does did 和be动词am is are 用法的区别助动词do does did do是原形，用于一般现在时态中的第一二人称和第三人称的复数（I,you,we,they）；does是do的第三人称单数形式，用于一般现在时态的第三人称单数（he,she,it，姓名）；did是do的过去式，用于一般过去时态的任何人称（I,you,he,she,it,we,they）。不管怎样，跟在这三个词后面的动词都必须为动词原形 。do does did+ V.（动词原形）例如： Do you like meat bananasfishapples? No,I dont.Does he like apples? No,he doesnt.He does like apples. like就是原形Where did he go yesterday? 他昨天哪儿了？Did you study English?