一般現在時do和does的區別和用法

例如：I often do my homework in the evening .

當主語是He/She/It或者其他單數名詞時，動詞用does。

例如：

She often does  homework in the evening .

2.作助動詞，無實際意思。通常用於疑問句和否定句。

(1)用於一般疑問句。直接在句首加上do/does，注意大小寫和部分人稱及動詞的變化。

例如：

I like apples.

Do you like apples?

Yes, I do.  /No, I don't.

當主語是三人稱單數時，用does.

例如：She likes apples.

Does she like apples?

Yes, she does.  /No, she doesn't.

(2)用於否定句時，在句子中加上don't或者doesn't.

例如：I don't like apples.

She doesn't like apples.