It's a good idea to take an umbrella with you. You...
You should take an umbrella with you.
It's not necessary to take water bottles to school. Students...
Students don't have to take water bottles to school.
What does this sign mean?
You must turn left.
It is necessary to wear uniform at this school. We...
We must/have to wear uniform at this school.
People under 18 are not allowed to get a driver's license. People under 18...
People under 18 mustn't get a driver's license.
It would be good for him to see a doctor. He...
He should see a doctor.
What does this sign mean?
You must/have to stop.
It is good for us to practise more exercise. We...
We should practise more exercise.
It's essential that you brush your teeth before going to bed. You...
You must/have to brush your teeth before going to bed.
What does this sign mean?
You mustn't use your cellphone.
Ryan has had lots of bad grades. What's your advice?
He should... (study harder).
It's good for people to have a balanced diet. People...
People should have a balanced diet.
What's does this sign mean?
You mustn't swim here.
Louise really wants to have a dog. What's your advice?
She should... (promise to take care of it).
It's forbidden to play loud music after 10 p.m. You...
You mustn't play loud music after 10 p.m.
It's not essential that my father helps me with the HW. My father...
My father doesn't have to help me with the HW.
What does this sign mean?
You mustn't park here.
It's not good for her to eat so much fast food. She...
She shouldn't eat so much fast food.
It's not necessary that Mike waits for me. Mike...
Mike doesn't have to wait for me.
It's not recommended that people spend too much time online. People...
People shouldn't spend too much time online.
It is essential that we pay attention to the HW correction. We...
We have to/must to pay attention to the HW correction.