我相信你们可以做到用英语怎么说

"I believe you can do it" 可以用英语表示为 "I believe in you"。

来源：这是一个常用的短语，它表达了对别人能力的信任。

例句：

"I believe in you, you can pass the exam." (我相信你能通过考试)
"I know things are tough right now, but I believe in you. You'll get through this." (我知道现在情况很难, 但我相信你, 你会度过这段时期的)