We have achieved still greater success this year than we did last year.

We have achieved still greater success this year than we did last year.
为什么句子中用did而不用have done或had done.
英语人气:321 ℃时间:2019-08-21 08:40:37
优质解答
have received是现在完成时,后半句last year用过去式就可以了
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