我信你用英语怎么说

"I believe in you" 表示对某人有信心，相信他们能够成功。这是一个常见的英语短语，没有特别的来源。

例句：

"I believe in you, you can do it." (我相信你，你能做到。)
"I know things have been tough, but I believe in you." (我知道事情有点困难，但我相信你。)
"I don't always agree with you, but I believe in you." (我并不总是同意你的观点，但我相信你。)