小学英语 » do和does的用法

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.

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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.变成否定句是:

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。

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。

Do you want to be a teacher? 你想成为一个老师吗?

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…