都跟听有关联，但是 hear，hear from，hear about 和 hear of 全是完全不一样的听，弄清它们的区别，使用准确的“听”。
一、hear 可作为及物动词，意为“听见，听到”，侧重于听的结果，例如：
I heard a voice.
我听见了一个声音。
I hear you.
我能听见你（的声音）。
I often hear Lucy sing in the next room.
我经常听见露西在隔壁房间唱歌。
I'm very sorry to hear that.
听到那件事我非常难过。
Did you hear something?
你有听见什么声音吗？
Hear 后面还可以跟 that 从句，如：
I hear that he is losing by his business.
听说他做生意亏本了。
I was surprised to hear (that) he was married.
听说他结婚了，我很惊讶。
二、hear from 意为”收到某人的信件（或电子邮件、电话等）；得到某人的消息“，例如：
I heard from my sister yesterday.
我昨天收到了我的姐妹的来信。
When can we expect to hear from the lawyer?
我们什么时候能收到律师的信？
I haven't heard from my daughter in two weeks.
我已经两个星期没有女儿的消息了。
The jury heard the testimony from the witness.
陪审团听取了证人的证词。
也可以意为“得到某人的训斥、责骂或惩罚”，例如：
If you don't do your homework, you're going to hear from me.
如果你不做作业，我会训斥你的。
I'm oing to hear from my parents when they see my bad grades this semester.
当我父母看到我这学期的糟糕成绩时，他们肯定会责骂我的。
三、hear of 意为”听说，得知”，后面跟人或事，例如：
Last week, I'd never even heard of that actress, and now, I'm seeing her everywhere!
上周，我从没听说过那个女演员，现在，我到处都能见到她！
Have you heard of the song?
你有听说过这首歌吗？
He heard about the accident yesterday.
他昨天得知有关这起事故的消息。
四、hear about 与 hear of 意思相近，hear about 知道的内容比 hear of 更加具体详尽，不一定是听到的，例如：
Wow, I'd heard about your injury from your mom, but I didn't realize it was so .
哇，我听你妈妈说你受伤了，但我没意识到这太可怕了。
Did you hear about Jade? She was in a car accident and broke her leg in three places.
你听说杰德的事了吗？她出了车祸，腿摔成了三节。
That website gave me a survey, me how I heard about it.
那个网站给了我一个调查，问我是怎么听说的。
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