Nitin as well as his friend Ramesh________coming to the party

Final answer: Use "is" — the complete sentence is: "Nitin as well as his friend Ramesh is coming to the party."

Explanation: The phrase "as well as his friend Ramesh" is parenthetical and does not change the number of the subject. The main subject is the singular noun "Nitin", so the verb must be singular.

• If the sentence used "and" (for example, "Nitin and his friend Ramesh"), the subject would be plural and the correct verb would be "are coming."

• "Were" is past tense, so it does not fit the present-time meaning of this sentence.

• "Have been" is a present perfect form and changes the aspect; it is not appropriate for this simple present statement about a current plan.