Used when unforeseen events make certain actions or plans necessary.

Unexpected Situations

Highlights the sudden importance or need for something that wasn't used before.

Relevance Emphasis

Often follows an event or condition that triggers the action.

Emphasizes the act of using a specific skill or resource you have.

Indicates that a person needs to actively contribute something, like a skill or idea.

Typically used in a legal or formal context, indicating the invocation of rules or policies.

Often used when authorities need to take official action or enforce laws.