often, usually, always, sometimes, everyday(week,month),once a week,on Mondays, etc.2.用助动词do提问,如主语为第三人称单数,则用does,同时还原为动词原形。2.此时态的谓语动词若为行为动词,则在其前加don’t;若主语为第三人称单数,则用doesn’t,同时还原行为动词。now, at this time, these days, etc.主语+am/ is/ are +not +doing过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为。ago, yesterday, last week(month, year…), in 2000, just now, one day, long long ago, etc.2.在行为动词前加do在其前加didn’t,同时还原行为动词。表示过去某段时间或某一时刻正在发生或进行的动作或行为。at this time yesterday或以when引导的谓语动词是一般过去时的时间状语等。过去发生或已经完成的动作对现在造成的一向或结果,或从过去已经开始,持续到现在的动作或状态。already, yet, just, ever, never, before, recently,in the past few years, 等,及由for或since引导的时间状语。表示将要发生的动作或存在的状态及打算、计划或准备做某事。tomorrow,tomorrow morning/afternoon, the day after tomorrow,next Sunday/week/year/month, soon, in a few days minutes, etc表示在过去某一时间或动作之前已经发生或完成的动作或情况。表示“过去的过去”。by, before等构成的过去时间短语连用或用于when, before, until等引导的从句中。由said, asked, told, thought等引导的宾语从句中。表示在过去的某个时候看来将要发生的动作或者存在的状态。The next day(morning, year), the following month (week),etc.2.was/were +not+ going to +do
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