should,must,can, may, shall, could, might的用法答:can, could, may, might, must, will, would, shall, should, need, dare, 及ought to, had better, be able to, used to四、情态动词的基本用法1、can / could1)表示能力,could主要指过去时间。Two eyes can see more than one. “ 两只眼比一只眼看得清。Could the girl read before she went ...