一，一般现在时谓语用动词原形do或第三人称单数 does形式 .
标志词有everyday , every sunday ,Always, Sometimes ,On saturdays ,in themorning 等等 .
二，现在进行时 am/is/are+doing形式 .
标志词 Now, at ,this time ,句首有look Hurry等警示语 .
三，一般过去时用动词的过去式d的 标志词有yesterday Last week ,Last month ,Last year ,时间段加ago ,Two years ago ,
四，过去进行时was /were +doing,标志词 at that moment, at this time of yesterday ,afternoon .
五我一般将来时用will do be going to do标志词tomorrow ,Tomorrow Morning ,In the future ,Next week , Next sunday ,
六，过去将来时
