Question

Which verb agrees with the subject in the sentence?

__________ you ever seen the Pacific Ocean?



A.
Has


B.
Hasn't


C.
Have

Answer 1

C. have
because it make sense when you read it out loud
you is more than one therefore it isn't has or hasn't

Answer 2

The subject is you and "you have" (not "you has" or "you hasn't"), so the answer is C. have.
Have you ever seen the Pacific Ocean?