用did,因为have done是现在完成时态,是过去的所以用did来表示强调。 直接将do或者did加在你所要强调的部分前面。 eg: I have done the work this morning 强调已做 I did have done the work this morning 强调时间 I have done the work did this morning...
用did,因为have done是现在完成时态,是过去的所以用did来表示强调。直接将do或者did加在你所要强调的部分前面。eg: i have done the work this morning强调已做I did have done the work this morning强调时间i have done the work ...