Identify the linking verb in questions 7-9

7.) Was

8.) Was

9.) Have been

Explanation:

"A linking verb connects the subject with a word that gives information about the subject, such as a condition or relationship. The most common linking verbs are forms of the verb to be: am, is, are, was, were, being, been."-https://examples.yourdictionary.com/examples-of-linking-verbs.html

I hope this helps!