would like,want,feel like的区别和用法

would like表示愿望,希望,或者是客气或委婉的语气.表示愿望,I would like to have a lot money.我希望有很多钱.表示委婉,I would like to order a main course.我想点正餐.
want相当于汉语的“想”或“想要”,后面可以接名次或动词.I want an ice cream.我想要一个冰激凌.I want to go home.我想回家.
feel like表示说话间或一时之间想要做的事情,有时候相当于汉语的“心血来潮”.比如,I feel like going shopping.我忽然想去逛街买东西.