does用于单三称(第三人称单数),do则用于一/二/三复(第一人称/第二人称/第三人称复数.
1、作为实义动词/行为动词,都是“做”的意思,都是一般现在时,主语是第三人称单数用does,其余人称用do ;
2、作为助动词,没有意义,构成疑问句,主语是第三人称单数用does,其余人称用do,后面的动词都用原形。
如
1). I / We / They do my homework every day .(do是实义动词)
我/我们/ 他们每天做作业。
2). He /She does his / her homework every day .(does是实义动词)
他/她每天做作业。
3). Do you get up at seven every day ?(do是助动词)
你每天7点钟起床吗?
4). Does Jim get up at seven every day ?(does是助动词)
吉姆每天7点钟起床吗?
5). What time does he go to school every day ?(does是助动词)
他每天几点钟上学?
1、do和does可以用作实义动词,在一般现在时肯定句中,其中does用在第三人称单数,do用在其它人称中,如:
He does his homework everyday.
I do excercise every Fridday.
2、do和does可以用作助动词,完成一般现在时的问句及回答和否定句中,其中does用在第三人称单数,do用在其它人称中,如:
Do you love me?/No, I don't.
Does he go to school everyday?/Yes, he does.
What do you do on Satudays?(第一个do)
What does he do every morning?
I don't like snakes.
He doesn't want to study English.
3、do可以作为实义动词,代替所提问的动作,用在特殊疑问句的各时态中,如:
How do you do?(第二个do)
What did you do last night?