have done 现在完成时 强调那整件事件事对现在有影响
如I have finished it .
did do 过去式的强调句型 did是强调 可以理解为的确的意思 变成不是强调的句式只要把did 去掉 后面的do变成did就行了 比如I did come here yesterday . did是用来表示强调的 变成一般的 去掉did 就是I came here yesterday.
[谁能解释给我听have done和did do有什么区别?]
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