Make a sentence expressing PROHIBITION.

The government has to keep order, manage foreign relations, provide services and create public policies. -> In this sentence, what does "has to" Express?

In a Monarchy, the royal family doesn't have to work. -> What does "doesn't have to" express in the sentence?

Make a sentence expressing INTERNAL OBLIGATION.

Countries HAVE TO / SHOULD have diplomatic conversations to avoid belic conflicts.

Make a sentence expressing LACK OF OBLIGATION.

Make a sentence expressing EXTERNAL OBLIGATION.

Make a sentence expressing ADVICE.

In a democracy, the President MUSTN'T / DOESN'T HAVE TO pass a law without the consent of the Congress.

In a dictatorship, you ... obey the dictator's desicions.

- Can I give you a piece of advice? You ... write a letter to the Governor to let him know about the garbage collection problem.

- I am really tired. I don't want to go to vote. - You should go, or you will have to pay a fine. -> In the last sentence, what do "should" and "have to" express?