过去时的结构:主语+动词过去式+其他。过去时一般指过去式,是英语语法的一种,表示过去某个时间里发生的动作或状态。
句法结构
肯定形式
主语+动词过去式+其他
例句:She often came to help us in those days.
否定形式
主语+didn't+谓语动词原型+其他
①was/were+not;
②在行为动词前加didn't,同时还原行为动词
例句:I didn't know you like coffee.
一般疑问句
①Did+主语+谓语动词原型+其他?
②Was/Were+主语+表语?
例句:Did I do homework?
规则动词过去式变化
(1)一般情况下,动词词尾加ed,如worked、played、wanted、acted。
(2)以不发音的e结尾动词,动词词尾加d,如:lived、moved、decided、declined、hoped、judged、raised、wiped。
(3)以辅音字母+y结尾的动词,把y变为i再加ed,如:studied、tried、copied、justified、cried、carried、embodied、emptied。
(4)以一个辅音字母结尾的重读闭音节动词,双写词尾辅音字母,再加ed,如:stopped、begged、fretted、dragged、dropped、planned、dotted、dripped。
不规则动词的过去式变化规律性不强,须多加记忆:go-went,make-made,get-got,buy-bought,come-came,fly-flew,is/am-was,are-were,see-saw,bring-brought,do-did,teach-taught,think-thought,say-said,sit-sat,put-put,grow-grew,take-took,catch-caught,come-came,become-became,swim-swam,sweep—swept,sing—sang,draw—drew。