(have) the policeman known the tourists were in trouble he might have managed to help them out
题目
(have) the policeman known the tourists were in trouble he might have managed to help them out
为什么不用had
答案
might是情态动词,情态动词后用动词原形,望采纳
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
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