(1)人教课本出现这样一个话：I waited in line to buy a copy of the new book but they had sold out.这里sold out为什么不用被动?
问题描述：
(1)人教课本出现这样一个话：I waited in line to buy a copy of the new book but they had sold out.这里sold out为什么不用被动?
答
要注意分析英文的指代关系
本句中book是单数,所以再次出现指代它一般都会用it,明显这里是they,所以指代的肯定不是书,而是买书的人们,那么sold 就不用被动