acquit的過去分詞怎么變

　　例句：

　　1、He acquitted himself brilliantly in the exams.

　　他在考試中表現出色。

　　2、She acquitted herself well in the meeting.

　　她在會上表現良好。

　　3、He acquitted himself to his credit.

　　他的行為值得贊揚。