Modals

We use ______ to say something that is possible, but not certain.

• may / might

• have to / has to

• ought to / should

• must / mustn't

We use _______ to talk about abilities in the present and past, possibilities, or ask for things in a formal and informal way.

• may / might

• can / could

• ought to / should

• must / mustn't

We use _______ for prohibitions, whenever the law has something to do in it, written rules or to avoid things that can be dangerous.

• may / might

• can / could

• must / mustn't

• should / shouldn't

We use __________ for personal obligations, rules at home or maybe at school. You need an auxiliary if you want to do the negative.

• must

• should

• may

• have to

We use ________ to give advice or recommendation.

• should / shouldn't

• might / mightn't

• must / mustn't

• have to / don't have to

We use _________ for moral obligations.

• should

• ought to

• must

• have to

We use needn't to express _________ .

• obligations in the past

• advice

• things that are not necessary to be done.

• things that are possible to happen.

It's very cloudy, it ________ rain later.

• might

• should

• must

• ought to

A: I have a terrible headache.

B: You _______ take an aspirin.

• may

• should

• must

• have to

I'll make a big party and it will be plenty of alchohol and food, you _____ bring anything.

• may

• might

• ought to

• needn't