孩子们在公园里大声喊叫，玩得很开心。

The kids were ___shouting happily in the park while playing.

妈妈因为弟弟打碎了花瓶而大声喊叫。

Mom started ___shouting when my brother broke the vase.

孩子们在操场上大声叫喊，互相追逐。

The kids were ___shouting at each other while playing chase on the playground.