What is the verb and subject in this sentence>

"His experience with computers and copy machines will be valuable in an office."

For the subject I got his but I can't figure out the verb!

His is not the subject.

The best way to find a subject and verb is to first put parentheses around the prepositional phrases. Subjects, verbs, and complements are never in prepositional phrases.

"His experience (with computers and copy machines) will be valuable (in an office)."

That leaves

His experience will be valuable.

Do you see the verb and subject now?

is the verb will?

experience the subject?

Yes.

Be is the verb.

thank you

The verb is WILL BE.

The subject is EXPERIENCE.