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Grammar,一。一般过去时1.意义：一般过去时用于表示过去发生的动作或存在的状态。通常与表示过去的时间状语连用Igotoschooleveryday.Iwenttoschoolyesterday.2.一般过去时的构成：主语+谓语动词的过去式+其他成分,陈述句a.主系表结构：主语+was/were+其他.Iwasathomeyesterday.Wewereathomeyesterday.b.主谓宾结构：主语+动词过去式+其他.Iwenttothezooyesterday.,一般疑问句：a.主系表结构Was/Were+主语+其他Yes,主语+was/were.No,主语+wasnt/werent.Wereyouathomeyesterday?Yes,Iwas.No,Iwerent.注：was,were为be动词的过去时。am，iswas,arewere用法与am,is,are的用法相同.,b.主谓宾结构Did+主语+v.原形+其他？Yes,主语+did.No,主语+didnt.Didyougotothezooyesterday?Yes,Idid.No,Ididnt.,3.动词过去式的构成：A.规则动词直接加-edlook-lookedopen-openedask-askedB.以不发音e结尾的动词加d,arrive-arrivedlive-lived,C.以辅音字母加+y结尾的,把y变为i加edcrycriedtry-triedcarry-carriedD.单词中只有一个元音字母,其后紧跟一个辅音字母(重读闭音节结尾的),双写辅音字母再加-edstop-stoppedswim-swimming,E.一些不规则动词需要单独记忆:iswasareweredodidgowentcancouldhavehad,
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