Where do they come from?What do they usually doWhere do they come_英语解答

Where do they come from?What do they usually do
Where do they come from?
What do they usually do
When do the children do their homewore?为什么前面要加do

人气：263 ℃　时间：2019-10-29 16:38:37

解答

因为这些都是特殊疑问句,然而,他们的原句没有be动词,就需要助动词do来变疑问句