Learn Farsi: هوا خیلی ابری است، شاید باران ببارد. - The weather is very cloudy; it might rain.

shâyad (might/maybe) is a special kind of word called an impersonal modal. This means it never changes its form. You don't add endings for 'I', 'you', or 'it' like you do with normal verbs. However, it still forces the main verb of the sentence to take the subjunctive form.

Why do we use both bârân and bebârad? Doesn't that literally translate to 'rain might rain'?

Exactly! In Farsi, the action of raining is usually expressed by pairing the noun bârân (rain) with the verb bâridan (to rain, to pour). So, saying 'rain rains' is the standard, natural way to express this in Farsi.

How is the subjunctive verb bebârad built here?

It follows the standard subjunctive recipe. It starts with the be- prefix, adds the present stem of the verb bâridan (which is bâr), and finishes with the third-person singular ending -ad (for 'it'). Put together, you get be-bâr-ad.

I see the word for cloud in abri. How does that ending work?

The word abr means 'cloud'. Adding the suffix -i to the end of many nouns turns them into adjectives. So abr (cloud) becomes abri (cloudy).