Modals

• Modals are auxiliary or helping verbs.
• Modals are used before the main verb.
• "Can" is used to express an ability or possibility.
• "Might" indicates a future possibility. This also applies to "Could".
• "Will" is used to make certain predictions in the future; as well as "Shall".
• "Must not" and "Cannot" are used to indicate prohibition.
• "Should" is used to recommend or suggest an action; and "Ought to" is also one.
• "Should" and "Ought to" also expressed Moral Obligation or to do what's right.
• "Can" is used to informally ask for permission. Whilst, "May" is used for formal writing or conversation.
• "Must" and "Have to" indicates obligation.
• "Shall" is used to make offers in formal contexts.
• "Could", as well as "Might" is used to suggest actions.
• Both "Could" and "Would" are used to politely ask for help.