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Hello guys, I'm here again. I'm back. As I told you in the other video,

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the second part about grammar in Unit 5 is related to must and mustn't.

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Okay, you're gonna say, all right, what is that?

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must and mustn't. I've got here these again that I've written. I just created these examples so

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just have a look at the grammar and forget about the rest of things, yeah? So, very important,

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when do we use must or for what objective? What do we use must for? We use must for rules, yes,

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or obligation and when do we use mustn't and listen again mustn't we must write

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is must yes then an apostrophe T but when we pronounce we don't pronounce

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this T imagine that is out yes also like that yeah good and when we use mustn't

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is not the negative part. It's not exactly the negative part of mustn't. It is, but not exactly.

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So, it's for prohibition, yes? When something is prohibited. It's not for obligation.

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All right. So, the affirmative part, which corresponds to must, and you have to pronounce

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the last T. Must. Yes. It's not must, please. It's must with A. Yeah. I'm going to read

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the sentences and then we will figure out, we will take out from these examples the structure.

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So, I must eat everything on my plate. You must be quiet. He or she must wash his or

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her hands we must have our id card what is the id card the id card is the the card we've got

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yes with our picture and is the card that we've got with our name address the name of our parents

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yeah uh yeah id in in spanish we've got d n i d n i yeah in english we say id card

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let's keep going you must pay when you buy something and they must study last one the

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last one is not exactly obligation but you should study the various yeah and the negative part

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the negative part I've written here I mustn't throw the paper to the floor you mustn't pick

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the flowers in a countryside or from the countryside like that he or like that he or she

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mustn't have chewing gum in class chewing gum yeah we mustn't shout in the hospital you mustn't

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touch someone else stuff what is stuff your things yeah in general stuff

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they mustn't smoke inside the underground yeah the metro good what is very important to remember

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um is that there is no question we've got must for affirmative sentences and mustn't for negative

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prohibitions and must for obligation but when you want to emphasize something to

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give it more stress like like when you're angry or something like that you can say you must not

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touch someone else's stuff yeah when you get mad at someone and we are going to um take out

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from all these sentences the structure. So, first of all, as in all sentences in English,

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we must write the subject, yes? Then, after the subject, we must write

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must in case of in case of affirmative sentences and mustn't in case of

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negative like prohibitions yes something that is banned that is prohibited then

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the verb, but how can you see the verb in here? Look. Eat, be, wash, have, pay, study, throw,

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peek, have, shout, touch, smoke. In which tense is it? Is it in past? Is it in future? Present

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simple present continuous so it's infinitive yes the verb in infinitive then the rest

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of the sentence so we've got here the structure sorry here subject plus must or mustn't

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must sorry or mustn't then the verb in infinitive always in infinitive and then

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the complement the rest of the sentence yes as in the other video as I told you

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in the other video I want you to try to understand everything that I've said if

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not you can go back and try to listen it again and if you're still having doubts

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just write them down in a paper and then let me know. As I said before, I hope everyone is

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alright, your family as well. I think everyone is doing it fantastic and I hope we will see

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each other soon okay so thank you very much guys and bye