should/ought to, We use _____ to give advice. , must/ have to, We use______ for obligation, strong advice, possibility., mustn't, We use_____ to say that something isn't allowed or for strong negative advice. , don't have to/ don't need to/ needn't , We use_____ to express lack of obligation or necessity. , to be supposed to, We use _____ to talk about rules and also about what people or expect..

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