是叫你把普通句子转成问句的.

题目

是叫你把普通句子转成问句的.
He often reads newspaper .
Does he often read newpaper
答案是这样的
我不知道为什么要加Does,
我当然知道是做的意思啦,
是不是代表他做那件事,所以转问句就用那个呢?
还有一条题目.
They always sing and dance on sunday .
Do they always sing and dance on sanday
也是加do的..
解释清楚的话、
可是不能加太多...（没分..）
Does he often read newpaper
Do they always sing and dance on sanday
请问谓语动词是那个，是代表read,sing and dance吗？

答案

这两个句子都是一般现在时态,因为句子中有谓语动词,所以改疑问句就是得加助动词do 或does
He often reads newspaper 此句中人称是第三人称单数,所以加does
They always sing and dance on sunday 此句中人称是第三人称复数,所以加do