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GMAT 语法 关于 based on在句首

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GMAT 语法 关于 based on在句首
based on the growth rates of large modern reptiles ,scientists estimate ...
为什么这句话是错的,需要改成on the basis of?
为什么用介词短语的形式可以不考虑逻辑主语
根据这次实验结果,我们得出了这个结论.一般怎么说呢?
Based on the results,we made a conclusion.
Based on the results,a conclusion was made by us.
哪个对,为什么?我为什么觉得都能说得通
GMAT 语法 关于 based on在句首
因为在这种 participle phrases 里,那个 participle 的主语一定要是后面分句的主语.
这里的 based on 的主语就必须是 scientists,那么就变成 scientists were based on the growth rates of ...这自然是不通的,因为其实是那个 estimate was based on the growth rates ...
On the basis of the growth rates of large modern reptiles这个词组,可以还原到 scientists estimate ...这个主分句最后那里.
同样的第二句句子就是Based on the results,a conclusion was made by us.正确