why not

US /waɪ nɑt/
UK /waɪ nɑt/
"why not" picture
1.

为什么不呢

used to suggest or agree to something

:
Let's go for a walk. Why not?
我们去散步吧。为什么不呢
You want to try the new restaurant? Why not!
你想尝尝那家新餐馆吗?为什么不呢
2.

为什么不呢, 原因是什么

used to ask for the reason why something is not happening or should not happen

:
You said you wouldn't go, but why not?
你说你不去,但为什么不呢
They decided not to implement the new policy. Why not?
他们决定不实施新政策。为什么不呢