Possibility: We may go out later, She could come out too I suppose, I might not have made it as a professional basketball player. , Obligation/No Obligation/Necessity: I must finish that project, You need to show ID to get in, You have to drive on the left in the UK, You don't have to finish the book, General Ability: I could ski when I was 5, I can play three instruments, Ability (specific occasion): I was able to find a parking space in the city centre, Deduction: He must have gone out. The lights are off in his house., You can't have seen Michael Jackson. He's dead!, She must be tired. She's been working 12hour shifts. , Advice : You should never give up on your dreams ,

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