Example: 1. We ought to take care of the environment. 9. Give advice using should/shouldn't or ought to/ought not to. 1) I am often late for school. You should wake up early to go to school. → 2) Some of my classmates get very bad marks at school. 3) I need to learn English much faster. 4) My brother doesn't know what to do after finishing school. 5) I'm bored when I have a lot of free time. 6) The territory of our school is dirty. 7) My sister is addicted to her mobile phone. 8) I'm very worried because the lessons at school are too difficult for me. ​