I'm confused about using "has" or "have" after "who". For example:
- I am a doctor who have confusion in using has or Have.
- I am a engineer who has 4 year experience, degree in engineering and is available.
Will it vary depending on I or Who?
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I am a doctor who has a treadmill.
We are doctors who have an X-ray machine.
I am a professor who has a tweed jacket.
We are professors who have published three papers.
The verb after who should match the object before who. (In the sentence structure you use, the subject [I/We] is independent of the object [professor/professors]):
I know a professor who has grey hair.
We know a professor who has mismatched socks.
I know two plumbers who have leaky sinks.
We saw three mathematicians who have proctectors in their pockets.
To quickly double-check your verb choice, simply remove the subject, predicate, and the who, and make sure it reads correctly:
"We know a doctor who have a new car," becomes "A doctor have a new car." (WRONG)
"We know the nurse who has a new sofa," becomes "The nurse has a new sofa." (RIGHT)