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I'm confused about using "has" or "have" after "who". For example:

  1. I am a doctor who have confusion in using has or Have.
  2. 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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1  
Also as a note: sentence 2 needs an an before engineer, an a before degree, and some clarification after available. Something like: and is currently available for work. –  Jim Mar 6 '12 at 0:33
    
Who is third person, so even if it refers to a first- or second-person (I, you) it takes third-person agreement (singular {-Z}, plural {-Zero}) in the present tense. –  John Lawler 2 days ago

3 Answers 3

up vote 7 down vote accepted

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)

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In both your examples, the correct answer is has.

The word has refers to the doctor or engineer, not to I.

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It should be has in both the places. The second sentence should have an Engineer I feel

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protected by tchrist 2 days ago

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