一、当表达缘由时
to和for都可以使用,但to此时是不定式的用法,后接动词原形,而for则直接后接名词,如:
I went to the supermarket to buy apples.
I went to the supermarket for apples.
二、当表示“给予”时
此时的to和for后面都可以接动作的对象,但用to时往往意味着句子的谓语动作会发生方位变化(事物从一个地方移到另一个地方),for则没有,如:
I made a cake for her.
I gave a cake to her.
三、当表达目的时
此时与第一条类似,to用作不定式后接动词原形,而for则直接后接名词,如:
I asked her to give me the key.
I asked her for the key.
扩展资料:
一、只能用to的情况
1、表动机或原因(motive or reason,后接动词原形)
例:I came here to talk to you.
2、表时刻(Telling the time)
例:Let's meet at ten to nine.
3、表距离(Distance)
例:It's only three kilometers from my house to yours.
二、只能用for的情况
1、表有益或有害的
Drinking water is good for you.
2、表一段时间
I lived in Spain for five years.
3、表计划或安排
I've made an appointment for May 4th.
TO 是有 方向 的意思
例: I will show a map to you
我将向你展示一张地图 (把地图给你看)
如果用FOR: I will show a map for you
为了你 我展示一张地图 (因为你要求 我展示地图给大家看)
FOR 是有 因为 的意思
例: Here is a present for you
这是为了你的礼物
如果用TO: Here is a present to you
这是寄向你的礼物
你好
for常用在三餐、时间段、价格、目的前
例(三餐):what do you usually have for lunch?——Four lunch, I like hamburger
还常带有目的性
时间段:例:I'm going to stay in Beijing for two weeks.
价格:We have great bags for ¥12
目的:I come here for help.
(以上都是我老师讲的,汗~打这么多字累死我嘞)