V. Rewrite the sentences:
1. It is essential that you do your homework before going to school.
You must
2. It is wrong of us to throw rubbish on the street.
→ We mustn't
3. It is necessary for us to be present at the class discussion on Saturday.
→ We must
It is not good for you to spend too much time playing video games.
You shouldn't
It is very important for you to be here at 6.00.
You must
is not safe for you to go there in rainy season.
You should
necessary for us to review the lessons for the test. (must)
a good idea when students copy other student's work. (shouldn't)