must - Obligation and necessity., mustn't - Something that is not permitted, not allowed, can - It can be used to express ability or opportunity, to request or offer permission, and to show possibility or impossibility., might/may/could - They are used mostly to express possibility., will - We use it to express beliefs about the present or future., have to - It mainly expresses general obligations., have to (not) - It shows that there is no obligation., should - It is most commonly used to make recommendations or give advice., to be supposed to - to be expected to do something, to be allowed to  - It means you have permission or are not hindered by someone., to be able to - If you are able to do something, you have skills or qualities which make it possible for you to do it., to make smb do smth - Make means to force somebody to do something., to let smb do smth - to allow, to permit (somebody) to do (something), to manage to do smth - to succeed in doing or dealing with something, especially something difficult,

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