How do you use verb pen in a sentence?

The verb "pen" is not a common English word. If you are trying to use the word "pen" in a sentence, you are likely referring to the noun "pen", which is a writing instrument.

For example:

* "I used a pen to write the letter."

* "Can you lend me a pen?"

If you were trying to use a different word, please provide more context or information so I can help you write a sentence.