Learn Farsi: دانشجوها باید پروژه را آماده کنند و گزارش را بفرستند. - The students must prepare the project and send the report.

bâyad is a modal verb that means "must" or "should". When you use it, the action verbs that follow it must change to the present subjunctive (a special verb form used for obligations, wishes, or possibilities). Since the students must do two things here, both âmâde konand (prepare) and beferestand (send) are placed in the subjunctive form.

Why does the verb beferestand start with the be- prefix, but âmâde konand does not?

To make the present subjunctive, we usually add the prefix be- to the present stem, which we see in beferestand (from the verb meaning "to send"). However, âmâde kardan ("to prepare") is a compound verb made of the adjective âmâde plus the helper verb kardan (to do/make). For compound verbs using kardan, we drop the be- prefix and just use the conjugated stem konand.

Does the word bâyad change its ending to match "the students" (dâneshju-hâ)?

No, it doesn't. bâyad is an "impersonal" verb, meaning it only has one fixed form. It stays exactly the same whether you want to say "I must", "she must", or "the students must". We know who is doing the action because the main action verbs at the end of the sentence (konand and beferestand) have the "they" ending (-and).

Why do we see the word râ twice in this sentence?