英语什么条件下用for和to

介词for 和 to 的区别:多读几个例子你就可以看到它们区别了.不能用中文来分析它们的区别!
(A) for :
(1)He prepared lunch for us.[给...受益者]
(2)He headed off for town.[指...目的地]
(3)He spoke for all the members.[代表...]
(4)He paid ten dollars for a ticket.[付款的...目的/物件]
(B) to :
(1)He turned to me and said...[朝]
(2) He went to the city.[指...方向]
(3) Their faces were pressed to the windows.[接触]
(4)We stood face to face.[正面]
(5)He was waiting for an answer to my letter.[关于]
(6)They worked from nine to five.[至]
(7)I'd like to go.[用在动词前...]
(8) Refer to a/the dictionary...[补语动词的关系]...
(C) "for/to" 可以通用例子:
(i) We went out to lunch.[lunch=动词]
(ii) We went out for lunch.[lunch=名词]