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Subject-verb agreement
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See this:

https://www.grammarly.com/blog/grammar-basics-what-is-subject-verb-agreement/?gclid=Cj0KCQjwj7CZBhDHARIsAPPWv3cvn-nxXYNFyPxKic10qoMe23Flnj-Kn3A2WkT9cBqptjBxFtIGhfwaAlJfEALw_wcB&gclsrc=aw.ds