He ____(teach)in Shanghai for two years before he came to teach in our school.
问题描述:
He ____(teach)in Shanghai for two years before he came to teach in our school.
答
has tought
答
had teached
答
has taught 楼上的两位都写错了,teach的过去分词是不规则变化taught,不是在后面加ed,也不是把a写成o