给我用英语讲个笑话怎么说

Sure! Here's a joke in Engpsh:

Why was the math book sad?

Because it had too many problems.

Did you get it? "Math book" and "problems" sound similar, so the joke plays on the idea of a math book being unhappy because it has a lot of problems to solve. It's a simple play on words, but I hope it made you smile!