英语中的十六种时态一般时态进行时态完成时态完成进行时态现在 do/doesam/is/are doinghave/has donehave/has been doing过去didwas/were doinghad donehad been doing 将来shall/will doshall/will be doingshall/will have doneshall/will have been doing过去将来should/would doshould/would be doingshould/would have doneshould/would have been doing一、一般现在时1.概念:表示经常发生的情况;有规律出现的情况;总是发生的;和事实真理2.时间状语: always, usually, often, sometimes, everyweek (day,year, month), once a week(day,year, month), on
