作业帮英语语法（than 引导的比较状语从句）What genetic modification seeks to do is modifying corps in a more planned way than is possible by merely selecting heathier seeds or by producing hybrids of successful plants.请问这里than is poss
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英语语法（than 引导的比较状语从句）What genetic modification seeks to do is modifying corps in a more planned way than is possible by merely selecting heathier seeds or by producing hybrids of successful plants.请问这里than is poss
英语语法（than 引导的比较状语从句）
What genetic modification seeks to do is modifying corps in a more planned way than is possible by merely selecting heathier seeds or by producing hybrids of successful plants.
请问这里than is possible.这里省略的部分是什么,如果将比较状语从句补充完整后,应该怎么表达.
英语语法（than 引导的比较状语从句）What genetic modification seeks to do is modifying corps in a more planned way than is possible by merely selecting heathier seeds or by producing hybrids of successful plants.请问这里than is poss
这是一个有争议的问题,以前.
有的人认为 than 本身可以作为代词做is 的主语.
但是,语言学家 Quirk 指出,这里实际上是省略掉了 what
than what is ···············
并且 Quirk 称这个 what 是 鬼!.
省略了it
it=modifying crops
完整：than modifying crops by ... or modifying crops by...
如果不明白，可追问
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句子主干是这样的结构： what XXX seeks to do is xxxx than xxxxx
than可以理解为 not, 即：genetic modification要做的是 modifying corps in a more planned way ,而不是仅仅selecting heathier seeds or by producing hybrids of successful plants。