Three years has/have passed

[joham]

Three years has/have passed since he came to live here.

Are both has and have correct in this sentence? Which would native English teachers advise their students to use?

Many thanks in advance.

 

[Barb_D]

Have.

 

[Tdol]

I would give the same advice, but has is also used sometimes if it is seen as a single period rather than a number of years.