时态填空,She ______before.(not do) 怎么填

来源：学生作业帮编辑：搜搜做题作业网作业帮分类：英语作业时间：2024/07/14 20:37:42

hasnt done
before 完成时标志
以前他没做过
就是到目前为止之前的时间是典型的现在完成时
不明白的再问哟,请及时采纳,多谢!
再问： the young girl who sat next to me on the plane was very nervous. She _________before.(not fly)
再答： hadnt flew
再问：诶，这又为什么了呢？
再答： hadnt flown 这是过去完成时因为之前已经是过去时在过去之前她就没坐过飞机所以是过去的过去要用过去完成时
再问：为什这里么是hadnt？

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