If you believe you can make her happy, I won't stand in your way.

如果你相信你能使她幸福，我不会妨碍你的。

《牛津词典》

I believe you can do it! Try to smile often.

我相信你能做到！试着多笑笑。

youdao

"I still believe that the central question for the BBC is: can you maintain eye contact and ear contact with the British public?" he writes.

他写道：“我仍然相信，BBC 的核心问题是：你是否能与英国公众保持眼神和听觉接触？”

youdao

I believe I can speak for the whole nation when I say this and compliment you for your work.

VOA: standard.2009.04.12

Since I say you can believe you're going to die, yet you can't picture it from the inside.

既然我说你可以相信人是会死的，但是你无法想象那种感受。

耶鲁公开课 - 死亡课程节选

I can't believe you don't want our walls to be red.

真不敢相信你不愿意把我们的墙壁刷成红色。

How about 实战 - SpeakingMax英语口语达人

You know, I remember when my first son was born, and I was like, oh, my gosh, I can't believe you're finally here.

NPR: Obama Urges Moving Beyond Bush Era

But as an employee, I believe you can progress much better, both financially and in skills, by staying in one place instead of jumping around.

FORBES: 10 Reasons To Stay At A Job For 10 Or More Years

While the vast majority of you are not going to be teachers in a classroom next year I believe that you can teach or mentor or inspire someone in your lives.

WHITEHOUSE: Salve Regina University