Construct the negative form of the imperative.
Example:
(to speak) loudly → Don’t speak loudly.
- (to stay) there. It’s dangerous.
Don’t stay there. It’s dangerous.
- (to be) so rude.
Don’t be so rude.
- (to forget) to tidy your room.
Don’t forget to tidy your room.
- (to eat) a lot.
Don’t eat a lot.
- (to keep) off the grass.
Keep off the grass.