Our teacher usually (help) us when we were at school .(help)应该怎么用？

Our teacher usually (help) us when we were at school .(help)应该怎么用？
Our teacher usually (help) us when we were at school .
(help)应该怎么用？

Our teacher usually (help) us when we were at school .(help)应该怎么用？
helped
注意后面有were,主从句时态要一致哦.

根据后面的"were"可知,括号内应填"helped".