〜つもり
plan to, intend to
Verb dictionary form / ない form + つもりです
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つもり states an intention: 来年、日本へ行くつもりです, "I'm planning to go to Japan next year". The verb before it is in the dictionary form, or the ない form for "plan not to": もう飲まないつもりです.
It's firmer than たい. 行きたい is a wish; 行くつもり is a decision you've made.
To ask about someone's plans, つもりですか is fine among friends, but can sound nosy to a superior: 何をするつもりですか can come across as "what do you think you're doing?". 予定 ("schedule") is the neutral alternative: 週末の予定は?
Examples
来年、日本へ行くつもりです。
I'm planning to go to Japan next year.
今晩は早く寝るつもりだ。
I'm going to bed early tonight.
週末は何をするつもりですか。
What are you planning to do at the weekend?
もうお酒は飲まないつもりです。
I'm not going to drink anymore.
大学で日本語を勉強するつもりです。
I plan to study Japanese at university.