为什么有助动词does动词有时还要变?

为什么有助动词does动词有时还要变?

不能变了吧?is是be动词,是描述性的,she is beautiful.is左右两边有等号概念.Is she beautiful?
does助动词,表示行为、具体的动作,does是人称的不同造成的,第一、二人称用do,第三人称单数用does.如she likes icecream.like就是一个表示行为的动词,因而变成一般疑问句时,要加助动词does.Does she like icecream?助动词提前,动词的第三人称单数还原为动词原形
Does he/she go to work by subway?
Does he/she teach math?
Does he /she read newspapers after lunch?
Does he/she go home at 5:30?
Does he /she watch Tv in the evening?
Does he/she go to bed at 10?
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第1个回答  2016-01-19
不用变。
这违反了英语的语法常识,请注意检查例句(包括题目)。因为,如果是针对此用法的改错题的话,看到这样的情况也就不奇怪了。
does 在第三人称单数作主语的现在一般时句子中,无论是作为疑问句的助动词,还是修饰谓语动词,都可以代替谓语动词的三单形式,即谓语动词保持原形不变,如下:
Does he ask for any help?
He does ask for help from anyone.