多少人用英语可以表达为"how many people"。这是一个很常见的英语表达方式，主要用来询问一群人的数量。例如：

How many people are attending the party tonight?

Can you tell me how many people live in your house?

I'm wondering how many people are going to join us for dinner.

希望以上回答对您有帮助。