Learn Farsi: لازم است که قانون‌های ایمنی را در این کارخانه رعایت کنیم. - It is necessary that we obey the safety rules in this factory.

The phrase lâzem ast ke (it is necessary that) is an impersonal modal. It doesn't change depending on who is doing the action, but it forces the main verb that follows it into the present subjunctive form. That's why we drop the mi- prefix to make re'âyat konim (that we obey).

Doesn't the present subjunctive usually start with the prefix be-?

Yes, simple verbs usually take be- in the subjunctive (like beravam for "that I go"). However, re'âyat kardan (to obey/observe) is a compound verb. For compound verbs ending in kardan, we form the subjunctive simply by using kon- (the present stem) with the personal ending, without adding be-.

Why does the direct object marker râ come after imeni (safety) rather than right after qânun-hâ (rules)?

In Farsi, râ must follow the entire direct object phrase, not just the first noun. Since "the safety rules" is a single connected noun phrase (qânun-hâ-ye imeni), râ goes at the very end of the whole chain.

How do we pronounce the invisible link between qânun-hâ (rules) and imeni (safety)?

They are linked by the ezâfe, which connects words like "of" in English. Because qânun-hâ ends in the long vowel sound "â", the ezâfe is pronounced as an extra sound to bridge the two vowels smoothly, making it sound like .