顿号的作用和用法简短（关于34）

1must be\ must do 用于现在时

He keeps looking at you, he must like you.

他一直在看你，他一定是喜欢你吧

She looks so beautiful, she must be a model.

她好漂亮，她一定是模特吧

He has been working out for 5 years, he must be very strong.

他已经健身5年了，他一定特别强壮吧

2must have been\ must have done用于过去时

He didn't show up last week, he must have been on vacation.

他上周一直没出现，他一定是去度假了

She must have been very excited, when her boyfriend proposed to her last night.

昨天晚上她男朋友向她求婚，她一定十分兴奋。

You got a 20% pay rise, you must have done a great job.

你的薪水涨了20%，你一定做得特别好吧！

You must wear a suit when you have a interview.

你面试的时候一定要穿西装

He must finish all his work before the meeting.

他必须要在会议前完成所有的工作

You must fasten your seatbelt when you're driving.

你开车的时候一定要系上安全带

You must show your passport to the immigration officer.

你必须要向移民官出示护照

You must follow the rules.

你必须要遵守这些规则

You must see a doctor, you've been sick for a week.

你务必要去看医生！你都已经病了一周了！

You must read that book! It's amazing!

你一定要去看那本书！真的是太棒了！

You must come to our party tonight! It'll be so much fun!

你一定要来参加我们今晚的派对！一定会非常有意思的！

Why must she always interrupt me?

她为什么总是要打断我？

Why must you argue with each other everyday?

你们非要每天都争吵吗？

Why must you make so much noise?

你什么偏要制造那么多噪音？

You may think the insurance is unnecessary, but it's a must.

你可能认为保险没有必要，但却是必不可少的

Eating Roast duck is a must if you come to Beijing.

如果你来北京，一定要尝尝烤鸭

It's a must to try different kinds of beer in Germany.

在德国尝试不同种类的啤酒一定是必须要做的事