plan to do 和plan on doing的区别

plan to do 和plan on doing的区别 plan to do 和plan on doing有什么区别? plan to do与 plan on doing的区别? plan to do 和plan on的区别,举例 plan to do/on doing 区别和造句 plan for sth和plan to do的区别 plan to do和prepare to do的区别 plan to do 还是doing plan on与 plan for的区别 plan to和intend to的区别 I plan to do sth和I am planning to do sth的区别 plan sth.plan to do sth.plan for sth.这三个短语的区别是什么?可以互换么?