A linking verb connects the subject to a word or words in the predicate.
The most common linking verbs are forms of be. Some forms of be are am , is, are, was, and were. Use am, is, and are to show present tense.
Jeremy and Keenan are playing in the sandbox.
I am writing in my journal.
He is playing soccer.
Use was and were to show past tense.
Aileen was running in the woods.
We were eating at a picnic yesterday.
Some other common linking verbs are become, feel, and seem.
The sky became dark after the sun set.
The cat feels colder in the winter.
Bobby seems surprised to see me.