Is “do” necessary here?
No, the word "do" is not necessary here. "Do" in this sentence is only used to add emphasis to the verb "want". It is common to see "do", "does", or "did" in front of a verb to make the verb sound stronger. Usually, "do" is stressed when speaking to further emphasize the main verb in the sentence. Ex: A: Do you like my new shirt? B: I do like your new shirt!
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