.时态概念时间状语基本结构:否定结构疑问结构一般现在时经常、反复发生的动作或行为及现在的某种状况。always,usually,often, sometimes, every week (day, year, month), once a week, on Sundays, etc.be动词;行为动词am/is/are+not;此时态的谓语动词若为行为动词,则在其前加dont,如主语为第三人称单数,则用doesnt,同时还原行为动词。把be动词放于句首;用助动词do提问,如主语为第三人称单数,则用does,同时,还原行为动词。一般过去时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, the day before yesterday, in 1989,just now,last week(year, night, month), at the age of 5, one day, long long ago, once upon a time,