I overheard a very funny conversation on the bus this morning.
I'm sure I didn't say that! You must have misheard (me).
3、keep your ear to the ground?耳听八方；保持关注
Peter'll know, he always keeps an ear to the ground.
I couldn't catch what the announcer said, with all the other noise going on.
He was eavesdropping on our conversation.
6、listen in on sth/sb?偷听，窃听
I wish Dad would stop listening in on my phone conversations.
7、strain your ears?竖起耳朵听
I was straining my ears to hear what they were saying.
I don't think you should say anything while the boss is still in/within earshot.
out of earshot?听不见
Wait till she's out of earshot before you say anything.
9、hang on someone’s every word?仔细听某人说话
Her audience were hanging on her every word.
10、ears prick up?侧耳倾听
My ears pricked up because I heard them mention Jonathan.
11、listen out for?等着听，注意听
Would you listen out for the phone while I'm in the garden?
12、must be hearing things?一定是听错了（表示不相信某事）
He's offered to wash the dishes - I must be hearing things.
13、not hear the end/last of sth?反复听，没完没了地听
We'll never hear the last of it if they win that competition.
14、hear sb out?听（某人）说完
At least hear me out before making up your mind.
15、be all ears?全神贯注地听；洗耳恭听
I'm all ears - tell us what they had to say.