What is the definition of a linking verb

Hey there,
A linking verb is a verb that joins the subject of a sentence to the complement.

Hope this helps :))

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A linking verb is basically 'connects' the subject with a word that gives information about the subject. Here are a few examples that will help you learn about what they are:
 - Bob is excited for his new promotion at work.
 - His knee went red after he fell on the carpet.
Hope this helped and have a splendid day!