not加动词原形等于什么?
why not加动词原形等于why don't you 加动词原形,例如:
If you love each , why not get married?要是你们彼此相爱,干么不结婚呢?(摘自《牛津词典》)(本句中,why not get married,也可以表示为why don't you get married?)
Why don't you come skating tonight?今晚来溜冰好吗?(摘自《牛津词典》)(本句也可以表示为why not come skating tonight?)