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在英语中，Do、Did 、Does的主要区别是人称、时态的不同。以下举例说明：
1、Do 用于第一人称单复数、第二人称单复数和第三人称复数或可作为第三人称复数的名词（称谓）的一般现在时的提问。
“you”根据上下文有单数“你”和 复数“你们”两种情况：
单数“你”，回答用“I”：
Do you like to speak English? 回答：Yes,I do. or No,I donot.
复数“你们”，回答用“we”：
Do you like to speak English? 回答：Yes,we do. or No,we donot
第三人称复数：
Do they like to speak English? Yes,they do. or No,they donot.
可作为第三人称复数的名词（称谓）：
Do your brothers like to speak English?
Yes,they do. or No,they donot.
2、Does用于第三人称单数或可作为第三人称单数的名词（称谓)的一般现在时的提问,其后的动词只能用原形，回答只有两种-男性/女性肯定用 Yes,he/she does,否定用No,he/she doesnot。
Does he/she get up early?Yes,he/she does. or No,he/she doesnot.
Does Mary get up early?
Does your brother walk to school?
3、Did 用语一般过去时的提问，不分人称、单复数, 后面的动词使用原形，注意回答和提问人称的对应一致
Did you speak English yesterday?
Yes,I did. or No,I didnot.
Did your brothers like to speak English last year?
Yes,they did. or No,they didnot.
If that can do you a favour, I would be very happy.
Best wishes to you!
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