confident 后接介词 in, of, about 对…有信心; 有把握

e.g.

You must be confident in what you do. 你必须对所做的事有信心

We are confident about the future. 我们对未来充满信心.

I’m fully confident of winning the title. 我对赢取冠军信心十足.

This time they’re confident of a happy ending. 这一次,他们确信会有一个快乐的结局.

I am not very confident about tonight's game.我对今晚的比赛不是很有把握.

be confident of。

1、be confident in sb/doing sth对某人充满信心／做某事。

2、be confident about dong sth/sth对某事／某事充满信心。

confident of确信。

be confident in信任。

be confident of对……事有信心，确信。

confident about相信。