why doesn't somebody do sth?a) (also why not do sth?) used to make a suggestion 某人为什么不做某事？〔用于提出建议〕 Why don’t you bring over a video for us to watch? 你干吗不带一盘录像带来给我们看看？
Why not relax and enjoy the atmosphere? 为什么不放松放松，享受一下这气氛？
b) used to say angrily that someone should do something 为什么不…？〔用于气愤地表示某人应该做某事〕 Why don’t you mind your own business? 你为什么不去管好你自己的事情？
why doesn’t somebody do something?• Why don't you give me your number, and I'll call you.• Why not have the picnic in Glendale?
→ why doesn’t somebody do sth? at why1(SPOKEN SECT)