一元钱用英语叫做"one yuan"，"yuan"是人民币的单位，它来源于汉语，意思是"圆"。

一些英文例句：

I only have one yuan left in my wallet.

Can you buy me a cup of coffee with one yuan?

The price of this book is only one yuan.

希望以上回答对您有帮助。