He finished his homework【 before his father came 】时间状语从句 对吗
题目
He finished his homework【 before his father came 】时间状语从句 对吗
答案
不对
应该是
He 【had finished】 his homework【 before his father came 】
因为发生在came这一过去动作之前
所以用过去完成时
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
最新试题
热门考点