一般都会用 believe、trust 来表示，
但其实也可以用「have faith in」这个句型来表示
「对...有信心；相信...」
have faith in相信，信任;
No matter what happens, she still has faith in him.
无论发生什么事，她依然对他有信心。《外研社英语同义词辨析词典》
We must have faith in the masses.
要相信群众。
We are in the face of difficulties, yet we still have faith in victory.
虽然面临许多困难，然而我们对胜利仍充满信心。
We have faith in love do you understand?
我们是真心相信爱情的你能明白吗?
He had implicit faith in the noble intentions of the Emperor.
他对皇帝的高尚意图深信不疑。
Have faith in people. Cynicism sours the disposition.
信任别人。愤世嫉俗使你的人格变质。
The public never had faith in his ability to handle the job
公众从来不相信他有能力胜任这一职位。
He retains a faith in human goodness.
他依然相信人是善良的。《柯林斯高阶英汉双解学习词典》
He has blind faith in doctors' ability to find a cure.
他盲目相信医生有妙手回春的能力。
She had an unshakeable faith in human goodness and natural honesty.
她坚信人的本性是善良诚实的。《柯林斯高阶英汉双解学习词典》
He also had an invincible faith in the medicinal virtues of garlic.
他同时也对大蒜的医学功效深信不疑。
People have lost faith in the British Parliament.
人们已经对英国议会失去了信任。
Have faith in god; god has faith in you.
信仰上帝;上帝也会相信你。
Have faith in our fighter pilots, don't rush your final checks.
信赖我们的战斗机驾驶员吧， 后检查别做得太仓促。
But I have faith in your vows.
但我相信你给我的誓言。
I have faith in her. 我对她有信心。
I have faith in what she said. 我相信她说的话。
介词是可以接从句，但是英语中有个非常重要的原则就是，介词后面不能接that从句，介词 和 that 从句 水火不容。
We must have faith in the masses.
要相信群众。
There are a lot of difficulties in front of us, yet we still have faith in victory.; we are in the face of difficulties, yet we still have faith in victory.
虽然面临许多困难，然而我们对胜利仍充满信心。
I have faith in his ability to succeed.
我相信他有成功的能力。
I have faith in her.
我对她有信心。
You clearly have faith in my judgment!
显然你很信任我的判断力！
类似“相信，信任”表达法：
1.be convinced of 确信
He is firmly convinced of the possibility of life on other planets.
他坚信在其他行星上可能存在生命。
I've never been more convinced of your love for her.
我终于确认你爱她了。
I'm convinced of his guilt.
我确信他有罪。
He became convinced of the need for cheap editions of good quality writing
他开始相信大众对优秀作品的普及本有需求。
I am convinced of her innocence.
我坚信她是清白无辜的。
You weren't convinced of Mr Matthews' guilt.
你不相信马修斯先生有罪。
He has yet to be convinced of the merits of self-repairing tunnels, however.
不管怎样，他仍然相信自动维修隧道的好处。
Mr baroin said he hoped that domestic opponents of the tax would be convinced of its pertinence.
巴胡安表示，希望国内反对征收该税的人将确信其适当性。
"It's a conviction kind of investment strategy, where you need to be convinced of the investment case or the sector or the theme, and very certain about the company you're investing in," says ms hirn.
希恩说道：“投资策略就是一种信念，你必须相信相关的投资案、行业或者主题，对你要投资的公司有十足的把握。”
"The majority of my colleagues can be convinced of the solidity of this compromise," he believes.
他认为，“大部分我的同事们能确信这项折中办法的可靠性。”
But governments will need to be convinced of the merit of these arguments before mining can begin.
但是在开采启动之前，政府仍需相信这些辩解中提到的优点。
2.take stock in购买…的股票，注意，相信
I don't take stock in what he is saying.
我不相信他所说的。