She often keep the office clean when she was at work.中的动词要怎样变化才对
问题描述：
She often keep the office clean when she was at work.中的动词要怎样变化才对
原题是he often -the office -when she was at work.
Akeeps；cleaned Bkept;cleaned Ckept;clean Dkeep;clean
答
这样的话选C
因为后面的从句“when she was at work"是过去式,主句和从句时态是一致的,那么主句也必然是过去式,排除了A D
然后Keep st.adj也是固定搭配,clean本身就是形容词.不能再加ED.那么最后选C