___________ express an obligation or necessity to do something , must, have to, need , all of them, When the speaker thinks personally that something is necessary, we generally use, must, have to , need, We use ____________ and ___________ to say that someone else has decided what is necessary , have to/ must, have to/ need, need/ must, The negative forms of have to and need to are very different from mustn´t , true, false, when we say that something is not necessary, or not important we use:, don´t need/ doesn´t need, don´t have to/ doesn´t have to , both answers are correct , You can use needn´t and a verb to say something is not necessary, true, false, We use ___________ to say that something is prohibited. , needn´t, don´t have to , mustn´t, What sentence is correct?, You mustn´t run during an earthquake, You don´t have to run during an earthquake, You needn´t to run during an earthquake, What sentence is not correct?, You needn´t wear a uniform , You don´t have to wear a uniform, You mustn´t wear a uniform.

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