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最佳答案:现在完成时一般疑问句结构:Have/Has+主语+动词过去分词+其它肯定回答:Yes,+主语+have/has.否定回答:No,+主语+haven't/hasn
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最佳答案:过去做的事对现在有影响或过去做的事,现在在继续将来还可能持续下去的时候用现在完成时
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最佳答案:Have you done your homework, Tom?Yes, I have.No, I haven't / have not.Cherry has
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最佳答案:1.现在完成时不可以与时间点连用,但表示到现在还在做某事可以用,结果是他直到现在还在做事2.都不对,yesterday 是明显的一般过去标志要用现在完成时,应该
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最佳答案:1.have been2.has been since3.has been dead4.has come back5.has been started for6
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最佳答案:1·she( has studied ) English for 5 years.she hasn't studied English for 5 years.
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最佳答案:没错,Yes,he has回答了现在完成时,他去过.he was there in April,.补充说明是什么时候去的,他是四月份去的.否定回答,也没错:说的
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最佳答案:I have met them. 肯定I met them 否定I didn't meet them 一般疑问 Did you meet them? 一般回答Y
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最佳答案:1.Mary has gone to school already.Has Mary gone to school?--Yes,she has./No,she
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最佳答案:一个过去的时间,过去时态,例如,since 1965;I have lived here since I was a little girl.