English translation of '何不'
why ... not
⇒ 何不叫你女朋友一起来？(Hébù jiào nǐ nǚpéngyou yīqǐ lái?)
Why don't you ask your girlfriend to come too?
⇒ 既然有事,何不早说？(Jìrán yǒushì, hébù zǎo shuō?)
You may have had things to do, but why didn't you say so earlier?
Translation of 何不 from the Collins Chinese to English Dictionary