Learn Farsi: قوانین قرنطینه را رعایت کنید، در غیر این صورت عواقب وحشتناکی دارد. - Follow the quarantine rules, otherwise it has terrible consequences.

The phrase dar gheyr-e in surat literally translates to "in other than this case." It means the exact same thing as vagarna (otherwise) but is slightly more formal and often used in serious warnings like this one. As taught in this lesson, we use the present indicative verb dārad (it has) right after it because we are stating a factual, definite consequence if the quarantine condition isn't met.

The word for consequences ('avāqeb) is plural. Why does it take the singular verb dārad?

This is a common rule in Farsi that is always worth reviewing: inanimate or non-human plural nouns usually take a singular verb. Since consequences aren't human, the singular verb dārad (it has) is perfectly natural here.

Both qavānin (rules) and 'avāqeb (consequences) look like they don't use standard Farsi plural suffixes. What are their singular forms?

These are Arabic "broken plurals," which are very common in Farsi and something you need to recognize at the B2 level. The singular of qavānin is qānun (rule or law), and the singular of 'avāqeb is 'āqebat (consequence or outcome).

What is the -i at the end of vahshatnāki doing, considering the noun is plural?