was 后面的动词必须要加ing
题目
was 后面的动词必须要加ing
例如：Their team was eliminated in the frist round.
was后面的这个词不用Ing吗?这样写正确吗?
答案
was done被动语态
was doing进行时语态
was to do也有
看具体句子意思,需要什么语态
Their team was eliminated in the frist round
他们队在首轮就被淘汰.是被动was done
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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