The book had been sold out when I got to the bookstore yesterday afernoon.

The book had been sold out when I got to the bookstore yesterday afernoon.

题目
The book had been sold out when I got to the bookstore yesterday afernoon.
The book【 had been sold out】 when I got to the bookstore yesterday afernoon.为什么不填has been sold out?因为从句中的got 可连接词是when而不是before啊?
答案
这是过去完成时,而has been sold out是现在完成时,before既可以做介词,又可以做连词,意思是"在^之前".后面接句子时,是连词,如:I had taught in that school before I moved here.before后面接单词或者短语时,是介词...
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
最新试题
热门考点

超级试练试题库

© 2017-2019 超级试练试题库,All Rights Reserved.