Can is often used to ask for and give permission.
- Can I sit here?
- You can use my car if you like.
- Can I make a suggestion?
- We can also use may and could to ask for and give permission but can is used more
- often.
Materi Prohibition (Larangan)
Both can’t and mustn’t are used to show that something is prohibited – it is not allowed.
- You can’t park here, sir.
- You can wear jeans but you can’t wear trainers in that bar.
- You mustn’t speak when the teacher is speaking.
Materi Obligation (Kewajiban)
Have to and must are both used to express obligation. There is a slight difference between the way they are used.
Have to shows us that the obligation comes from somebody else. It’s a law or a rule and the speaker can’t change it.
- Do you have to wear a uniform at your school?
- John can’t come because he has to work tomorrow.
- In Britain you have to buy a TV licence every year.
- I must call my dad tonight.
- You must hand in your homework on Tuesday or your mark will be zero.
- You must come and visit us the next time you come to London
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