Share don't need to or mustn't
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You don't need to go.
→ Stay here. Don't leave.
→ You can stay if you want.
You mustn't go.
→ Can I go? No!
→ Can I go? Yes, if you want.
You don't need to eat the cake.
→ Don't eat it!
→ It's your choice. If you want, you can eat it.
You mustn't eat the cake.
→ Don't eat it!
→ It's your choice. If you want, you can eat it.
You don't need to wear a jacket.
→ Can I wear jacket? Yes. Can I wear something else? Yes.
→ Can I wear jacket? No!
You mustn't wear a jacket.
→ Can I wear jacket? Yes. Can I wear something else? Yes.
→ Can I wear jacket? No!
You don't need to do the homework.
If I choose not to do homework it's NOT okay. I can't.
If I choose not to do homework it's okay.
You mustn't do the homework.
If I choose to do homework it's NOT okay. I can't!
If I choose to do homework it's okay.
You don't need to open the door.
→ It's already open / someone else will do it.
→ Keep it closed.
You mustn't open the door.
→ Keep it closed.
→ It's already open / someone else will do it.
The sign says "No Photos".
A) You don't need to take photos.
B) You mustn't take photos.
You don't need to eat the cake. → Can I eat it?
NO
YES
You mustn't eat the cake. → Can I eat it?
YES
NO
You don't need to stay. → Can I stay?
YES
NO
You mustn't stay. → Can I stay?
NO
YES
You don't need to bring your book. → Can I bring it?
NO
YES
