he cleaned the room this morning改成一般疑问句麻烦解释一下怎么改?
问题描述:
he cleaned the room this morning改成一般疑问句
麻烦解释一下怎么改?
答
Did he clean the room this morning?
对动作动词发表疑问,要加助动词,并根据时态和人称对其进行变化.