what do they do yesterday?有什么错

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whatdotheydoyesterday?有什么错whatdotheydoyesterday?有什么错whatdotheydoyesterday?有什么错第一个do改为did有不会的可以问我!助动词

what do they do yesterday?有什么错
what do they do yesterday?有什么错

what do they do yesterday?有什么错
第一个 do 改为 did
有不会的可以问我!

助动词用did

what did they do yesterday?

what did they do yesterday?