by the time he realizes the mistake he has made,it will be too late for him to do anything about i
题目
by the time he realizes the mistake he has made,it will be too late for him to do anything about i
为什么用has made?
答案
整句是主将从现,从句by the time he realizes 是现在时,从句的从句the mistake he has made用现在完成时,表示在realizes的时候the mistake已经发生完毕
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