Why not 和 Why don't 都表示“為什么不,為何不”,表示建議或責備,但結構不同:
Why not+動詞原形
Why don't +主語+謂語動詞 (為特殊疑問句 )
Why not take a good rest in the shade? 是否應在樹蔭下好好休息一下呢?
Why not have a drink? 為什么不喝一杯呢?
Why don't you look it up in the dictionary? 你為什么不查一下字典呢?
Why not try again? 為什么不再試一下呢 ?
Why don't you try again?
Why not do like that? 為什么不那樣做呢 ?
Why don't you do like that?
Why not ask him? 為什么不問他呢 ?
Why don't you ask him?
提示
表示建議也可用what about +名詞或動名詞,how about +名詞或動名詞,參見有關部分。