The above also expresses the speaker's wish or desire to do something. When N is the direct object of the verb in the Vたい pattern, it can be marked by either が or を.
→わたしは テープレコーダーが かいたいです。
I want to buy a tape recorder.
→わたしは テープレコーダーを かいたいです。
I want to buy a tape recorder.