do和does的用法 does是什么意思

do 这个词(does是第三人称单数形式) , 大体上从两方面来讲 。
1.作为行为动词 , 跟其他动词一样 , 如study, play等 。他的意思是“做”等 。如:
We usually do our homework in the afternoon.
He does his homework in the evening.
2.作为助动词 , 也就是帮助主要动词构成否定和疑问等 。
We don't like bananas.
Do you like apples?
Does he like English?
He doesn't like swimming.
上面有一句He does his homework in the evening.要是变成否定句就成了这个样子:
He doesn't do his homework in the evening.
这里加上了助动词doesn't , 而原来的主动词does变成原形do了 。
【do和does的用法 does是什么意思】作为助动词的do和does是没有词义的 , 它们在句中的构成一般现在时的疑问句和否定句.
Do用于主语第一人称 , 第二人称和第三人称复数形式的句中 , does用于主语第三人称单数的句中 。
Eg. Do you want to be a teacher? 你想成为一个老师吗?
Do his friends go to park every day? 他的朋友们每天都去公园吗?
I don’t like him. 我不喜欢他 。
Where does Tom come from? 汤姆来自哪里?
I don’t know.我不知道 。
He doesn’t live here. 他不住在这儿 。
will/can/could/would/should/shall 等助动词后面加be其他时候, 第一人称I后面用am第二人称, 复数, 用are单数用is...

    推荐阅读