英语语法as much spare time as is necessary 中的is用法是否正确,如果正确为什么要用它

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英语语法
as much spare time as is necessary 中的is用法是否正确,如果正确为什么要用它

as much spare time as is necessary 中的is用法是否正确,如果正确为什么要用它?
答：正确.
因为后一个as是连词,引导比较状语从句的连词,既然是从句,就是有主谓结构的句子.但是,由than,as引导的比较状语从句,为了避免重复,常省略与主句中相同的句子成分.这里用了is只是没有省略而已.其实省了也可以.
就象：Peter is taller than Tom (is).中的is.

she is willing to devote as many spare time as is necessary这 The distance is as much as 110 million kilometers.这里为什么要用as 英语语法：as much as 的用法解析 I am old ----(as much or as many as is necessary) to look af 求助as的用法,当as前用逗号隔开时,as is shown和as shown哪一种表达是正确的. as we all known 还是 As we all know 正确?用不用分词形式?那为什么有as is well A great man once said it is necessary to dill as much as pos spare的用法,spare some time to do sth.是否是对的?如不对,正确的是? he is as tall as she is 还是 he is as tall as is she?有区别么,哪个正确 as brave as sb和as brave as sb is那个正确正确翻译I spend as much time out of the house now as I did when as as的用法,“It is not as easy as you think.”一句中的as as 可以换成什么