The phrase 'Would you mind...?' is a polite and common structure used to make a request, asking for assistance or a favour.

The use of 'Let's' (Let us) is a key indicator of a suggestion, proposing a course of action for a group to consider.

This sentence explicitly forbids an action (entry without authorization), which is the definition of a prohibition. It's a common format for signs and official notices.

The sentence is a formal and polite way of asking someone to attend a social event (dinner), which is the primary purpose of an invitation.

This is an imperative sentence, a direct command given with urgency and authority. It is a clear order.

The use of the modal verb 'Could' in a question form, especially with 'possibly', makes it a polite request for an action.

The phrase 'must not' is a strong modal expression used to forbid an action, making this a clear prohibition.

The words 'Perhaps' and 'should' are used to propose an idea for consideration, not to command or forbid it, which is characteristic of a suggestion.

This sentence expresses a desire for someone's presence at a specific event (a wedding), which is the core function of an invitation.

The phrase 'I was wondering if you could...' is a polite and indirect way of asking someone to do something, which is a request.

The modal phrase 'had better' is used to give a strong command or warning, implying negative consequences if not followed. It functions as an order.

The structure 'Why don't we...?' is a common way to propose an idea or a course of action for joint consideration, making it a suggestion.

The use of the word 'forbidden' explicitly states that an action is not allowed, which is the definition of a prohibition.

This sentence is a formal and polite way of asking someone to attend an event or meeting, which serves as an invitation.

This is an imperative sentence using a direct verb ('Turn off') and an adverb ('immediately') that conveys urgency and authority, making it a command or order.

The phrase 'It might be wise to...' gently proposes a course of action without compelling it, which is characteristic of a suggestion.

The phrase 'is not permitted' is a formal way to state a rule that disallows a certain action, thus functioning as a prohibition.

The colloquial phrase 'Do you fancy coming...' is an informal way to ask someone to join an activity or event, serving as an invitation.

The use of the adverb 'kindly' softens the imperative 'grant me', turning what could be a demand into a formal and polite request.