- must / have to = it's necessary. must often comes from the speaker; have to is often a rule.
- mustn't = it's forbidden.
- don't have to = it's not necessary.
- should = advice.
- Past: had to.
| meaning | example | |
|---|---|---|
| must / have to | necessary | I have to wear a uniform. |
| mustn't | forbidden | You mustn't smoke here. |
| don't have to | not necessary | You don't have to come. |
| should | advice | You should see a doctor. |
Examples
- I must call my mum.personal obligation
- You don't have to pay. It's free.not necessary
- You mustn't touch that!forbidden
- You should drink more water.advice
- I had to work late yesterday.past
✅ Exercises
9 exercises: choose the right answer or type the missing word. Score 70% to complete the topic.