例句：
I shrugged, as if to say, 'Why not?'
我聳了聳肩，仿佛在說，“為什么不？”
Why not?
有何不可？
Why not retrain for a job which will make you happier?
為什么不接受新的培訓，找一份讓你更快樂的工作？
Why not have it out with your critic, discuss the whole thing face to face?
為什么不和批評你的人講個明白，面對面地把整件事情談一談呢？