We use (should / must ) to say what we think is necessary.
MUST
We use (should / must ) to say what we think is a good idea.
SHOULD
You (must / should ) get enough sleep.
You must get enough sleep.
I really (must / mustn't) study for that Maths exam.
I really must study for that Maths exam.
You (should/must) get between 8 and 9 hours of sleep each night.
You should get between 8 and 9 hours of sleep each night.
You (must / mustn't) come to my party this weekend. I really want you there!
You must come to my party this weekend. I really want you there!
You (mustn't / shouldn't) watch TV before you go to bed.
You shouldn't watch TV before you go to bed.
My parents have told me I (should / shouldn't) stay in this weekend.
My parents have told me I should stay in this weekend.
Teenagers (should/must) spend at least an hour a day doing something relaxing.
Teenagers should spend at least an hour a day doing something relaxing.
You (shouldn't/ mustn't) go to bed late the night before an important exam.
You shouldn't go to bed late the night before an important exam.
How many hours of sleep (should/must) people get every week?
How many hours of sleep should people get every week?
I (must / mustn't) forget to take my project to school tomorrow. I forgot it yesterday and today!
I mustn't forget to take my project to school tomorrow. I forgot it yesterday and today!
What (must / mustn't) parents do to make sure their children are getting enough sleep?
What must parents do to make sure their children are getting enough sleep?
You (should / shouldn't) go to bed so late!
You shouldn't go to bed so late!
You (must / should) hang out with your friends too.
You should hang out with your friends too.
You (must / mustn't) see the sleep project they uploaded on the school website. It's great!
You must see the sleep project they uploaded on the school website. It's great!