Present perfect or present perfec subjunctive

Question

Which is more correct?

No conozco a nadie que no ha ido a un médico al menos una vez o No conozco a nadie que no haya ido a un médico al menos una vez

Answer 1

See this reference:

http://users.ipfw.edu/jehle/courses/subjadj.htm

More examples of the three types of situations:

1. The indicative is used in an adjectival clause when there is a definite antecedent:

2. The subjunctive is used in an adjectival clause when antecedent is negated:

3. The subjunctive is used in an adjectival clause when there is an indefinite antecedent:

In this case since you don’t know of one, it is indefinite and should be subjunctive.

If you said such a person did not exist, it would fall under 2 and also be subjunctive, if you said you knew one, or that one existed- it would be 1 and indicative- but saying you don't know one is equivalent to saying you don't know if such a person exis - bosquederoble, Apr 17, 2016

Which is indefinite- category 3. There may or may not be such a person, but if there is, you don't know them. :) - bosquederoble, Apr 17, 2016

Yup! - Daniela2041, Apr 17, 2016

Or i should have said, you don't know if they exist. Thanks, Daniela. :) - bosquederoble, Apr 17, 2016

Answer 2

Gracias. The subjunctive is such a struggle for us newbies.

De nada. :) - bosquederoble, Apr 17, 2016