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Hello, today we are going to talk about modal verbs. What are exactly our modal verbs?

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Modal verbs are auxiliary verbs that are used together with another verb to express necessity,

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ability, obligation, possibility. In this presentation we are going to talk about

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These different models, those which express possibility, obligation, ability, permission, advice, or prohibition.

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The general characteristics of a modal verb is that they agree with any subjects.

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They do not have infinitive form or participle.

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They are always followed by a bare infinitive without to.

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to form questions. They use the inversions.

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They change the position of the subject and the verb.

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And we must take special attention

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to have to and be able to because they are considered

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semi-models, not models, because they

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have different characteristics.

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To express possibility, we use may, might,

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or could. For example, we can say a sentence like

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I might change the world soon.

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To express obligation, we can use

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should or have to, must or ought to.

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I must be a good leader.

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That's the example. To express ability,

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we have can, could and the semi-model

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be able to. As an example, I can be anything I dream. To express permission, we can use may,

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may I, can, can I, could, could I, or even will or would. Can we save the world together?

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to express advice, we can use should or the most formal ought to. You should always listen to your

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heart. To express prohibition, we can use mustn't or can't. You mustn't do evil things.

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And in this last slide in the presentation, we have a resource page. If you click in any of the

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superheroes that we have here, they will take you to an online activity where you can practice

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all these modal verbs that we have discussed in this presentation. Have fun!