形式有participate ，participants,participation,participated,participating

The initial reaction of most participants is fear多数参与者的最初反应是恐惧。

2.He described himself and Altman as victims rather than participants in the scandal他把他自己和奥尔特曼描绘成这一丑闻的受害者而不是参与者。

3.He has been an active participant in the discussion.他一直积极参与这次讨论。

4.Participants were categorized according to age.参加者按年龄分组。