English grammar worksheet focusing on obligations, prohibitions, and recommendations with visual examples.

I'll work through each sentence to determine whether it needs "should," "must," or their negative forms based on the intention of each statement.

Let me analyze each one:

1. Drivers _______ always stop on red lights.
- This is a legal requirement/obligation → must

2. If you are going to drive, you _______ consume alcoholic drinks.
- This is a prohibition (you should NOT do this) → must not / mustn't

3. Students _______ review their lessons each day of class.
- This is a recommendation/advice → should

4. Guests _______ dress elegantly to assist at weddings.
- This is a social expectation/recommendation → should

5. Children _______ play with matches.
- This is a prohibition (dangerous!) → must not / mustn't

6. Cars _______ step on the white line before zebras when stopping at an intersection.
- This is a prohibition (traffic rule) → must not / mustn't

7. People _______ smoke in indoor public spaces.
- This is a prohibition (law/rule) → must not / mustn't

8. People looking for a job _______ arrive at least 15 minutes before the time of their job interviews.
- This is a strong recommendation → should

9. Oliver _______ eat so many hamburgers, he's putting up a lot of weight.
- This is advice/recommendation (negative) → should not / shouldn't

10. Men and women _______ be treated as equals.
- This is a moral obligation/requirement → must

11. If you attend a cinema, you _______ talk or use your mobile once the film has started.
- This is a prohibition (rule) → must not / mustn't

12. Women _______ smoke during their pregnancy and they definitely _______ be in a place full of smokers.
- First blank: prohibition → must not / mustn't
- Second blank: prohibition → must not / mustn't

13. Children _______ keep their rooms tidy and clean.
- This is a recommendation/expectation → should

14. Students _______ manage their time carefully when taking a timed test.
- This is a recommendation/advice → should

15. People _______ turn off their mobile phones at the movies.
- This is a requirement/rule → must

Final Answer:
1. must
2. must not / mustn't
3. should
4. should
5. must not / mustn't
6. must not / mustn't
7. must not / mustn't
8. should
9. should not / shouldn't
10. must
11. must not / mustn't
12. must not / mustn't; must not / mustn't
13. should
14. should
15. must