He often did his homework after school对不对

问题描述:

He often did his homework after school对不对

对那么I often do homework after school 对不对?若对的话,为什么do和did可以同用?也对。用did 时,表示过去发生的事情,如上下文的时间是过去。如果表示现在也经常这么做,就用does