do(does, did) 的用法

(1)構成疑問句或否定句

How did you know about it?你是怎樣知道這件事的。

He does not smoke. 他不抽煙。

(2)加強語氣。

He did tell that.他的確告訴了此事。

Do come and see us.一定來看我們。

(3)代替前面剛出現的動詞，避免重復。

-You like popular music, don't you?你喜歡流行音樂，是吧?

-Yes , I do.是的，我喜歡。

He speaks French as fluently as she does.他講法語和她講的一樣流利。

(4)用于倒裝句中。

Never did he pay attention to my words.他從不注意我的話。

Only then did I understand the importance of English.只是那時，我才了解到英語的重要性。

(5)構成否定的祈使句。

Don't be so careless.不要那么粗心。

Do not hesitate to come for help.只管來求助。

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