Anne is said to _________ in Africa ,and she will come back next monthA do researchB be doing researchC have done researchD have been doing research我想问为什么不选D 过去完成进行时,就是相对过去的某个时刻来说已经对现在

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Anne is said to _________ in Africa ,and she will come back next monthA do researchB be doing researchC have done researchD have been doing research我想问为什么不选D 过去完成进行时,就是相对过去的某个时刻来说已经对现在
Anne is said to _________ in Africa ,and she will come back next month
A do research
B be doing research
C have done research
D have been doing research
我想问为什么不选D
过去完成进行时,就是相对过去的某个时刻来说已经对现在有直接影响并且还在进行的动作吗

Anne is said to _________ in Africa ,and she will come back next monthA do researchB be doing researchC have done researchD have been doing research我想问为什么不选D 过去完成进行时,就是相对过去的某个时刻来说已经对现在
答案是 B be doing research
这是动词不定式的进行形式 作主补 表示主语正在做某事 根据句子意思 应该选B
选项 A do research是动词不定式的一般形式 作主补 表示主语将要做某事
选项C have done research是动词不定式的完成 形式作主补 表示主语已经做了某事
选项D have been doing research是应该首先排除的选项 因为不定式根本没有这种形式
注意 不要 把 谓语形式 与动词不定式的形式 混为一谈
句子中 根本没有 过去完成进行时
这是并列的两个 简单句 第一个简单句是一般现在时的被动语态
句子意思 是 据说 Anne正在非洲做研究工作 她将下个月回来
这里考查的是 不定式的形式
根本与 时态无关 时态指的是 谓语形式的时态

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