Verb[plain] + つもり
Adj-i + つもり
Adj-na + な + つもり
Noun + の + つもり
~つもり is used to describe what someone intends or plans to do, or what they assume to be true.
Expressing Intentions or Plans: Indicates a strong intention or plan to perform an action in the future.
Describing Assumptions: Expresses that someone believes or assumes they are in a particular state or have done something.
Expressing "Supposed to Be" or "Acting As If": Conveys that someone behaves or assumes a role as if something is true.