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I see below suggestion in Grammarly on Subject and Verb Agreement.

"The verb needs does not seem to agree with the subject that. Consider changing the verb form."

And they give below examples on this as suggestions:

***Incorrect**:
Tom and Jenny loves entering trivia contests.
**Correct**:
Tom and Jenny love entering trivia contests.*

***Incorrect**:
The book, including all the chapters in the first section, are boring.
**Correct**:
The book, including all the chapters in the first section, is boring.*

As an explanation, they say "A singular subject requires a singular verb, and a plural subject requires a plural verb. "

But in the above example that is not the case, Tom and Jenny are two people and they use love and not loves. Can anybody clarify me on this? Thanks

marked as duplicate by JonMark Perry, sumelic, Mitch, J. Taylor, John Feltz Aug 11 at 15:32

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  • 1
    Love is the plural form of the verb and loves is the singular. – Araucaria Aug 10 at 8:12
  • 1
    "Tom and Jerry" is a plural subject requiring the plural verb "love". – BillJ Aug 10 at 8:43

Tom and Jenny is a plural noun, because it is referring to 2 people. Hence, it requires the plural verb "love", without "s" at the back.

On the other hand, in the sentence "The book, including all the chapters in the first section, is boring.", "including all the chapters in the first section" is merely a clarification; and can be treated as a "distractor": it is not useful in deciding the verb you use. The sentence can be simply reduced to "The book _ boring." Since "book" is the singular noun, a singular verb "is" would fit.

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