1、当句中有某种转移的意思时，或者是某物被从一个地方转移到另一个地方时，要使用“to”。2、当做有利于某事或某人的事情时，用for；当你想表达意图或者是做某事的原因时，用for。
1.表示“当作、作为”。如:I like some bread and milk for breakfast.我喜欢把面包和牛奶作为早餐。What will we have for supper?我们晚餐吃什么?
2.表示理由或原因,意为“因为、由于”。如:Thank you for helping me with my English.谢谢你帮我学习英语。Thank you for your last letter.谢谢你上次的来信。 Thank you for teaching us so well.感谢你如此尽心地教我们。
3.表示动作的对象或接受者,意为“给……”、“对……(而言)”。如:Let me pick it up for you. 让我为你捡起来。Watching TV too much is bad for your health.看电视太多有害于你的健康。
4.表示时间、距离,意为“计、达”。如: I usually do the running for an hour in the morning.我早晨通常跑步一小时。We will stay there for two days. 我们将在那里逗留两天。
1.向；至；往：She's going to London.她要去伦敦。Turn to the left.向左转。Pisa is to the west of Florence.比萨在佛罗伦萨的西面。He has gone to school.他上学去了。
2.（用于表示一系列事物或一段时间的尽头或限度）直到：from Monday to Friday从星期一到星期五 from beginning to end从开始到结束。
3.用于表示接受者：Give that to me.把那个给我。I am very grateful to my parents.我很感激我的父母。What have you done to your hair?你把头发怎么搞的？Sorry I didn't realize you were talking to me.对不起，我不知道你是在跟我说话。
4.接触到；针对：He put his hands to his ears.他将两手捂住耳朵。They sat back to back.他们背对背坐着。She made no reference to her personal problems.他没有提及自己的个人问题。