1)構成一般疑問句。例如:
Do you want to pass the CET? 你想透過大學英語測試嗎?
Did you study German? 你們學過德語嗎?
2)do + not 構成否定句。例如:
I do not want to be criticized. 我不想挨批評。
He doesn't like to study. 他不想學習。
In the past, many students did not know the importance of English.
過去,好多學生不知道英語的'重要性。
3) 構成否定祈使句。例如:
Don't go there. 不要去那裏。
Don't be so absent-minded. 不要這麼心不在焉。
說明: 構成否定祈使句只用do,不用did和does.
4)放在動詞原形前,加強該動詞的語氣。例如:
Do come to my birthday party. 一定來參加我的生日宴會。
I did go there. 我確實去那兒了。
I do miss you. 我確實想你。
5)用於倒裝句。例如:
Never did I hear of such a thing. 我從未聽說過這樣的事情。
Only when we begin our college life do we realize the importance of English. 進了大學以後,我們才認識到英語的重要性。
說明: 引導此類倒裝句的副詞有never, seldom, rarely, little, only, so, well等。
6)用作代動詞。例如:
---- Do you like Beijing? --你喜歡北京嗎?
---- Yes, I do. --是的,喜歡。(do用作代動詞,代替like Beijing.)
He knows how to drive a car, doesn't he? 他知道如何開車,對吧?