精选优质文档-倾情为你奉上1 一般现在时 主语 + 系动词 标志词有often，usually，always等 要注意“单三”，即he she it2 现在进行时 主语+be动词 +动词-ing形式 标志词有now，at this time3 一般过去时 主语+动词过去式 标志词有ago, yesterday, the day before yesterday, last week, just now等4 过去进行时 主语+ was/were + doing 标志词有at that time等5 现在完成时 主语+ have/has + done 标志词有recently, lately, since6 过去完成时 主语+had + done 标志词有before, by the end of last year等 7 一般将来时 主语+ am/is/are/going to + do；will/shall + do.；be+doing标志词有tomorrow, next day(week, month, year
