mary was watching the running race.还是mary was watch the running race.
题目
mary was watching the running race.还是mary was watch the running race.
答案
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
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