孩子们在操场上聚集在一起玩游戏。

The children were ___gathering together on the playground to play games.

她在缝制裙子时，把面料聚拢起来形成漂亮的褶皱。

She was ___gathering the fabric to create beautiful folds for the dress.

孩子们在门口挤成一团，挡住了通道。

The children were ___bunching together at the door, blocking the hallway.