What's the difference? You should see a doctor. vs You must see a doctor.
Must - stronger advice/ recommendation
10
What's the difference? I have to get up earlier tomorrow because..... I must get up earlier tomorrow.
I have to : external obligation e.g. because I have a meeting at 7:30. Must: I say so! I feel so! I want to get up early: this is MY, MY , MY decision!
10
What's the difference? You don't have to go shopping. You mustn't go shopping.
don't have to: not necessary / mustn't: prohibition
5
Paraphrase: It's prohibited to use a cell phone here.
You mustn't use a cell phone here.
10
Paraphrase: It's my obligation to be at work at 8 a.m.
I have to be at work at 8 a.m.
15
Paraphrase: I'm not obliged to go to workshops. It's my choice.
I don't have to go to workshops.
15
Doctors are obliged to wear white coats at work.
Doctors have to wear white coats at work.
10
We don't have to/ mustn't hurry. We have plenty of time.
don't have to
10
My jeans don't fit me anymore. I have to/ must lose some weight.
must/ personal obligation
10
Your hair is too long! You __________ have it cut!
should / ought to
15
__________ I buy the blue T-shirt or the red one? I can't choose!
Should
15
You ____________ to see a doctor about your earache or it may get worse!
ought
5
__________ you __________ walk your dog or not?
Do/ have to
15
I __________ study harder. I want to be a top student!
must
10
You __________ press that button under any circumstances, OK?!
