All my brother wanted to do was play volleyball with his friends.这句话对不?
题目
All my brother wanted to do was play volleyball with his friends.这句话对不?
答案
不对,was 是动词,play也是动词,应该把play改为playing.
至于was还得看是过去想还是现在想,要是过去想现在不想了就是was,要是现在也想就用is
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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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