Subject + 要 + 疯 + 了
The adjective 疯 (fēng) means "crazy," "insane," or "mad" and describes a state of mental disturbance or extreme behavior. It is commonly used in the expression 要疯了, meaning "about to go crazy." It can describe both literal insanity and figurative frustration.
最近工作太多,我快要疯了。
Zuìjìn gōngzuò tài duō, wǒ kuài yào fēng le.
There's been too much work lately, I'm going crazy.
你别这样做,简直太疯了!
Nǐ bié zhèyàng zuò, jiǎnzhí tài fēng le!
Don't do that, it's absolutely crazy!
她疯了一样冲出门去找孩子。
Tā fēng le yīyàng chōng chū mén qù zhǎo háizi.
She rushed out the door like a madwoman to find her child.