Lesson 35 · Stage 3: Plans, requests & comparing
No obligation: don't have to / needn't
IntermediateForm & use
don't have to / don't need to / needn't + verb — something is not necessary
1.Form
To say something is not necessary (you can do it, but you don't need to), use don't have to, don't need to or needn't + base form.
| Form | Example | Note |
|---|---|---|
| don't / doesn't have to | You don't have to pay. · Thu doesn't have to work on Sundays. | the most common; fine in any situation |
| don't / doesn't need to | We don't need to hurry. | same meaning as don't have to; keep the to |
| needn't | You needn't wait for me. | no to, no -s; a bit formal, mostly British |
| didn't have to / didn't need to | We didn't have to queue. | past |
| won't have to / won't need to | We won't have to take the ferry any more. | future |
needn't works like a modal (no -s, no to): He needn't come. need as an ordinary verb takes to and do: He doesn't need to come. Don't mix the two (not needn't to, not doesn't need come).
2.When to use it
1. Something is optional — you can do it if you want
You don't have to come with me. I can go alone.
It's Sunday tomorrow, so I don't have to get up early.
2. The situation means someone is free from doing something
Thu doesn't have to pay rent. She lives with her parents.
The test is open-book, so you don't need to learn the dates by heart.
3. Telling someone not to bother — polite and friendly
You don't have to bring anything. Just come!
You needn't worry. Everything is ready.
You don't have to shout. I can hear you.
really means: please stop shouting
4. Asking whether something is necessary
Do I have to bring my passport? — No, you don't.
Do we need to book? — No, you don't need to. Just walk in.
3.Don't have to or mustn't?
These look similar but mean completely different things:
| Meaning | |
|---|---|
| You don't have to tell him. | It isn't necessary to tell him (but you can). |
| You mustn't tell him. | Don't tell him — it's not allowed. |
You don't have to pay for the drinks. They're free.
You mustn't park here. It's for ambulances only.
Quick test: if you could add “…but you can if you want”, use don't have to. If you mean “it's forbidden”, use mustn't.
4.Talking about the past
In the past, use didn't have to or didn't need to: it wasn't necessary.
The bus was almost empty, so we didn't have to stand.
Lan didn't need to cook — her mum had made dinner.
If something was done but turned out to be unnecessary, British English can use needn't have + past participle. In everyday speech many people simply say didn't need to.
Oh, you needn't have bought milk — I got some this morning.
you bought it, but it wasn't necessary
5.Common mistakes
You mustn't pay for the drinks. They're free.You don't have to pay for the drinks. They're free.
Not necessary → don't have to; mustn't means forbidden.
He don't have to work on Saturdays.He doesn't have to work on Saturdays.
he/she/it → doesn't.
She doesn't has to cook tonight.She doesn't have to cook tonight.
After doesn't, use have, not has.
You needn't to call me first.You needn't call me first.
No to after needn't.
You don't need bring anything.You don't need to bring anything.
don't need needs to.
We haven't to wait.We don't have to wait.
The negative of have to uses don't.
Examples
- It's Sunday tomorrow, so I don't have to get up early.
- Thu doesn't have to worry about rent. She lives with her parents.
- We don't need to hurry. The film starts at nine.
- You don't have to take your shoes off. Come in!
