請問你要對自己有信心英文甚樣說啊？

You need to have confidence for yourself.

Also/In addition, you are responsible for what decisions you have made.

你要對自己有信心
You should have confidence in oneself
對自己所做的決定要負責任
Be responsile for your decisiion
希望幫到你
圖片參考：http://tw.yimg.com/i/tw/ugc/rte/smiley_1.gif

1 (信心) You have to have convidence in yourself.
2 (負責任) You have to be responsible for your choice.

Hope I can help you.

1: you have to believe in yourself
2:you have to consciention to your decides