were playing 是过去进行时,一般来说需要有一个明确的过去的时间点或时间段才用这个时态。
例句：
Three boys were playing marbles.
三个男孩儿在玩弹子游戏。
Children were playing in the snow.
孩子们正在雪地里玩。
Children were playing in the waves.
孩子们在海浪中嬉戏。
The kids were playing in the street.
孩子们在街上玩。
Many of golf's living legends were playing.
当时有许多当世高尔夫球传奇选手在打球。
温馨提示：
