disappoint后接at/with/in/about最大的区别是惯用语意思不同:
1、表示对某人感到失望，通常用介词 with, in。
I’m disappointed in you! How could you have lied likethat? 你让我失望了，你怎么能像那样说谎呢?
My parents will be disappointed in /with me if I failin the exam. 要是我考试不及格，我父母会对我感到失望的。
2、 表示对某一行为(doing sth)感到失望，通常用介词 at, about等。
We are all disappointed at /about his failure. 我们都为他的失败而感到失望。zn
He was really disappointed about /at not being able togo. 他未能去成实在感到失望。
3、表示对某一事实或情况感到失望，一般用介词 with, at, in 等。
He’s disappointed at /in the result. 他对结果感到失望
He must be very disappointed with /at/ about your examresults. 他对你的考试成绩一定非常失望。
扩展资料:
英语中at，for，by的介词用法:
1. at表示“以……速度”“以……价格”。It flies atabout 900 kilometers an hour. 它以每小时900公里的速度飞行。
I sold my car at a high price. 我以高价出售了我的汽车。
2. for表示“用……交换，以……为代价”。He sold his car for 500 dollars. 他以五百元把车卖了。
注意：at表示单价(price) ，for表示总钱数。
3. by表示“以……计”，后跟度量单位。
They paid him by the month. 他们按月给他计酬。
Here eggs are sold by weight. 在这里鸡蛋是按重量卖的。
be disappointed about/ with/at sth.
be disappointed in sb.本回答被提问者和网友采纳
disappoint at (v.+prep.)
对…失望 feel upset
He was disappointed at the result.他对这样的结果感到失望。
2.disappoint in (v.+prep.)
对…失望 feel upset
1) be disappointed in sb/sth
I'm disappointed in her.我对她感到失望。
3.disappoint with (v.+prep.)
对…失望 feel upset
1) be disappointed with sb/sth
I'm disappointed with you.我对你感到失望。
4.disappoint about (v.+prep.)
对…失望 feel upset
1)be disappointed about sth
用于be ～ed结构
We are much disappointed about the weather.这天气叫我们很扫兴。
disappoint at (v.+prep.)
对…失望 feel upset
He was disappointed at the result.他对这样的结果感到失望。
2.disappoint in (v.+prep.)
对…失望 feel upset
1) be disappointed in sb/sth
I'm disappointed in her.我对她感到失望。
3.disappoint with (v.+prep.)
对…失望 feel upset
1) be disappointed with sb/sth
I'm disappointed with you.我对你感到失望。
4.disappoint about (v.+prep.)
对…失望 feel upset
1)be disappointed about sth
用于be ～ed结构
We are much disappointed about the weather.这天气叫我们很扫兴