Is the sentence The cat are climbing the tree Improper subject-verb agreement?

Answer 1

Yes, the sentence "The cat are climbing the tree" has improper subject-verb agreement. The subject "cat" is singular, so it should be paired with the singular verb "is" instead of "are." The corrected sentence would be "The cat is climbing the tree." If you intended to refer to multiple cats, you would use "cats" to match with "are," as in "The cats are climbing the tree."