Learn Farsi: آن آقا دکتر است. - That gentleman is a doctor.

In Farsi, the verb almost always goes at the very end of a sentence. While English says 'That gentleman is a doctor,' Farsi arranges the sentence as 'That gentleman a doctor is.'

Where is the word for 'a' in 'a doctor'?

Farsi often skips the word for 'a' or 'an' when talking about someone's profession or describing a general category. Because of this, using just the word دکتر (doktor) on its own perfectly translates to 'a doctor' in this context.

Does آقا (aaghaa) mean 'man' or 'gentleman'?

It translates to 'gentleman' or 'sir', but in everyday Farsi, it is the most common and polite way to refer to any man. The literal word for man is مرد (mard), but saying آن آقا is much more polite, just like saying 'that gentleman' instead of 'that guy.'

Would people actually pronounce است (ast) in a normal conversation?

Usually, no. است is the formal, written word for 'is'. In casual, everyday spoken Farsi, people drop it entirely and just attach a short 'e' sound to the end of the previous word. So, in conversation, they would say دکتره (doktore) instead of دکتر است (doktor ast).