I visited a friend last Sundy.变一般疑问句
问题描述:
I visited a friend last Sundy.变一般疑问句
答
Did you visit a friende last Sunday?
变疑问句:
如果谓语是动词原形,句首就加助动词do(但这里要考虑到时态问题)
如果谓语是系动词(am,is,are),情态动词,那该句将系动词或情态动词提前即可.