interjection 语气词
An interjection is a part of a speech that shows the emotions of the speaker!
语气词是相当重要的，可以表达出一个人的情绪。

hmmmmm
嗯...（思考的时候用）
D: Hey Mumu, what do you think I should do to make my English pronunciation sound better?
木木，你觉得我怎么练习好我的发音呢？
M: Hmmm... I think you should learn Interjections.
嗯...我觉得你可以学习语气词。
D: Hmmm... That actually sounds helpful!
嗯...听上去挺有用的！

Jeez...! 天啊!
（表示惊讶或者厌烦的时候用）
Jeeez that watch is expensive!
天啊，这个表也太贵了吧！

Phew!
松了一口气的时候用
M: I am so sorry it was raining badly outside that is why I am late!
不好意思，下大雨，我迟到了。
D: You are lucky the meeting was cancelled.
你很幸运，会议取消了。
M: Phew! (sigh) that was close!
唷...差点...

Ahem！
要别人听你讲话的时候用
Ahem! Ahem! Ladies and gentlemen may I please have your attention?
阿咳...阿哼...（清嗓子）...先生们，女士们，注意啦!

Oops 哎呀
常在不小心犯错时用
Oops I didn't mean to break your heart into a million pieces.
哎呦，不小心伤了你的心。