The computer could have been used by them.改为一般疑问句应该是?
问题描述：
The computer could have been used by them.改为一般疑问句应该是?
答
Could the computer have been used by them （英语里,含有情态动词的句子在改为一般疑问句时,把情态动词提前大写即可）望采纳!