Marginal ModalsUsed toThis is used- to express something that existed or was done in the past but no longer exists or is done now.ExamplesHe used to go jogging when he was younger.Ought to/ Oughtn't toThis is used- to express a duty or obligation.ExamplesYou ought to pay for the vase that you broke.- to express a possibilityExamplesIf we leave now, we ought to be there in an hour time.- to
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