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语法题里的比较题经常做的我很晕,有的时候than后面的谓语动词是可以省略的,有些时候不能省略
我大致上是知道几种省略的情况的,
1.若主句和比较从句的主谓完全一致,可以全部胜率
2.若谓语动词相同,可以用do did does替代
3.若为情态动词,可以省略动词,保留情态动词
4.若是在比较时间状语,可以直接省略主谓
但下面这道题我就挺懵逼的,
这题比较的对象,在我看来是vehicles powered by natural gas emit和 do vehicles burning of gasoline or diesel fuel这样比较。若是不补出do 岂不就是排放在和车子比较了吗?
我有听说过核心词比较,这个概念,就是不知道怎么理解,有人理解这个概念的话能否给我讲一下 谢谢!
Because natural gas is composed mostly of methane, a simple hydrocarbon, vehicles powered by natural gas emit less of certain pollutants than the burning of gasoline or diesel fuel.
(A) less of certain pollutants than the burning of gasoline or diesel fuel
(B) fewer of certain pollutants than burning gasoline or diesel fuel do
(C) less of certain pollutants than gasoline or diesel fuel
(D) fewer of certain pollutants than does burning gasoline or diesel fuel
(E) less of certain pollutants than those burning gasoline or diesel fuel
正确答案是E
另外还有一题
In the 1980’sthe rate of increase of the minority population of the United States was nearly twice as fast as the 1970’s.
(A) twice as fast as
(B) twice as fast as it was in
(C) twice what it was in
(D) two times faster than that of
(E) two times greater than
这道题选C。但是我之前看到论坛里一位大牛说 对比的时候,前面出现了状语从句,而且比较的对象是时间状语的时候 不需要补全than后面的主语啊 请问有大大能解释下吗
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