1. It’s very cold outside, you should wear a coat.
2. I’m sometimes tured in my Maths class, I should get more sleep.
3. I never remember what homework I have to do, I must concentrate
4.I’ve got a really important exam tomorrow, I mustn’t go to bed late
5. I usuay get very hungry before lunch I shoult get a snack
6. Olivia really wants me to help her, I must call her later