借我三百块英语怎么说

你可以说 "Can I borrow 300 yuan/dollars/pounds from you?" 或者 "I was wondering if I could borrow 300 yuan/dollars/pounds from you." 这句话的来源是从英语中借用的。

其他一些类似的英文例句包括：

"I'm a little short on cash right now. Could I borrow some money from you?"
"I need to pay for something unexpected and I don't have enough money. Do you think you could lend me some?"
"I know I can always count on you for help. Could you lend me 300 yuan/dollars/pounds?"

中文翻译分别为：

"我现在现金有点紧。你能借给我一些钱吗？"
"我需要支付一些意外的东西，但我没有足够的钱。你认为你能借给我一些钱吗？"
"我知道我总是可以指望你的帮助。你能借给我 300 元/美元/英镑吗？"