用动词的适当形式填空 John ___(do) his homework every night...答:does 一般现在时 一、 一般现在时:1.概念:经常、反复发生的动作或行为及现在的某种状况.2.时间状语:always,usually,often,sometimes,every week (day,year,month…),once a week,on Sundays,3.否定形式:am/is/are+not;此时态的谓语动词若为行为动词,则在其前加don't,如主语为第三人称单数,...