用动词的适当形式填空 John _____(do) his homework every night.
问题描述:
用动词的适当形式填空 John _____(do) his homework every night.
明天要用了!
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,则用doesn't,同时还原行为动词.
4.一般疑问句: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.
例句:.It seldom snows here.He is always ready to help others.