英语时态问题不懂!Nancy is supposed to (...)做完化学实验at least two weeks ago?答案为什么是have finished her /the chemical experiment?为什么用完成时?这里不是有two weeks 应该用过去时态啊!
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![英语时态问题不懂!Nancy is supposed to (...)做完化学实验at least two weeks ago?答案为什么是have finished her /the chemical experiment?为什么用完成时?这里不是有two weeks 应该用过去时态啊!](/uploads/image/z/14359004-44-4.jpg?t=%E8%8B%B1%E8%AF%AD%E6%97%B6%E6%80%81%E9%97%AE%E9%A2%98%E4%B8%8D%E6%87%82%21Nancy+is+supposed+to+%28...%29%E5%81%9A%E5%AE%8C%E5%8C%96%E5%AD%A6%E5%AE%9E%E9%AA%8Cat+least+two+weeks+ago%3F%E7%AD%94%E6%A1%88%E4%B8%BA%E4%BB%80%E4%B9%88%E6%98%AFhave+finished+her+%2Fthe+chemical+experiment%3F%E4%B8%BA%E4%BB%80%E4%B9%88%E7%94%A8%E5%AE%8C%E6%88%90%E6%97%B6%3F%E8%BF%99%E9%87%8C%E4%B8%8D%E6%98%AF%E6%9C%89two+weeks+%E5%BA%94%E8%AF%A5%E7%94%A8%E8%BF%87%E5%8E%BB%E6%97%B6%E6%80%81%E5%95%8A%21)
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