but to do和but for doing的区别

except to do 和but to do的区别 can't help but doing,can't help but do ,can'help doing的区别 but to do和but do的差别 【区别】 to sb for doing sth 和 for sb to do sth 的区别 = = use to,be used to do,be used to doing和be used for的区别 to do和doing的区别 to do和doing的区别? require to do 和 doing的区别 doing和to do的区别 doing和to do的用法区别. to do 和doing放句首的区别 sorry to do和sorry for doing区别