大家用英文怎么表达？

一般来说“大家”翻译成英文就是everyone，all、everybody，we等等，这取决于语境和用意。
everyone：pron、每个人;人人;所有人;每人。
everybody：pron、(某个群体中的)每个人;所有人;人们。

OK, everybody, let's take it from the top、

好，咱们大家从头再唱一遍。

Why didn't you e? Everybody else was there、

你为什么没来呢？其他所有的`人都来了。

Everyone was clamouring to know how much they would get、

大家都吵闹着想知道他们能得到多少。

Everyone would stand up when the teacher entered the classroom、

老师走进教室时大家都会起立。

We should spend the money on something that will benefit everyone、

我们应该把这笔钱花在大家都能得益的事上。