be confident about 和of的區(qū)別

　　例句：

　　I am confident about the future of our company.

　　我對我們公司的未來充滿信心。

　　I am confident about the prospect of my career.

　　我對我的職業(yè)前景充滿信心。

　　We can be fairly confident of our ability to create tests that are valid and reliable.

　　我們可以相信我們有能力編寫合理可信的測試題。

　　I have every reason to be confident of our victory.

　　我有充分的理由堅信勝利是屬于我們的。

　　Hey, you must be confident of yourself if you want to succeed.

　　你必須對自己有信心才能成功！