would like是什么词性

would 是情态助动词,是助动词的一种,情态助动词包括 will(would),shall(should),can(could),may(might),must,need,dare,ought to,used to,had better 后接原形不定词.
would like = 想要
I would like some coffee （我想要一点咖啡）和 I want some coffee （我要一点咖啡）
的区别在于语气：第一句表示委婉语气的要求,第二句是直接语气的要求.