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So now we're going to look at modals in negatives. So the first one is mustn't. You must not.

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And that is for prohibition. Something that you are not allowed to do. Absolutely not

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allowed to do. So for example, we mustn't leave our homes at the moment. The next one

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is don't have to. Don't have to. Now this is a little bit different. When you say you

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don't have to, it's because you have the choice. You don't have to if you don't want to. So

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for example, it's not necessary. I don't have to make the dinner yet. It's only five o'clock.

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It's not necessary to make it now. I don't have to do it.

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And then shouldn't. It isn't recommended. It's not a good idea.

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So, for example, you shouldn't smoke. It's not healthy. Don't do it. You shouldn't smoke.