You had your singing contest in your school last week
题目
You had your singing contest in your school last week
改为反意疑问句是didn' you还是hadn't you
为什么有的时候had是用didn' you,有的时候用hadn't you
答案
didn' you,因为这个是过去时,所以用did't you
用hadn't you是在过去完成时中用.例如,She had finished her work when we got there,hadn't she?
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