mary was watching the running race.还是mary was watch the running race.
问题描述：
mary was watching the running race.还是mary was watch the running race.
答
前面那个，后面那个不符合语法。
答
was watching因为是过去进行时
答
was watching
过去进行时,was/were + doing ...表示在过去某一时间正在发生的动作.
“玛丽当时正在看赛跑.”
如果不是过去进行时,watch 前边也不能加was
希望我的回答能够帮到你,不懂的再问!
答
Mary was watching the running race.