He suffered an injury to kis knee, and this is causing him pain and discomfort.

Identify Verb/Verbs

Answer:
is
pain
discomfort

Thanks Sue

He suffered an injury to his knee, and this is causing him pain and discomfort.

Nouns: pain, discomfort

A Superblade was used at the 2 o'clock position, and the anterior chamber was entered

suffered, is, causing

In the given sentence, the verb/verbs are:

- "is" (present tense of the linking verb "to be")
- "causing" (present participle of the verb "cause")

These verbs indicate the actions or states being described. "Is" denotes the current state of suffering an injury to the knee, while "causing" shows the action of the injury resulting in pain and discomfort.