Learn Farsi: یا این سوزن شکسته است یا پارچه سنگین است. - Either this needle has broken or the fabric is heavy.

We use the paired conjunction yâ ... yâ .... The first yâ comes right before the first possibility (in suzan shekasteh ast), and the second yâ introduces the second possibility (pârcheh sangin ast). It works very similarly to English!

Is shekasteh ast the present perfect tense ("has broken") or just an adjective with the verb "to be" ("is broken")?

It can actually be both! shekasteh is the past participle of the verb shekastan (to break). When combined with ast (is), it forms the present perfect tense, meaning "has broken." However, just like in English, past participles often act as adjectives, so treating it as "is broken" is also perfectly correct here.

Why do we need to say ast (is) twice in this sentence?

Because yâ ... yâ ... is linking two complete, separate clauses here: "this needle is broken" and "the fabric is heavy." Since they have different subjects (suzan and pârcheh) and different descriptions, each part needs its own verb.

What kind of "heavy" does sangin mean here?

In Farsi, sangin means heavy in weight. When talking about fabric (pârcheh), it means the material is thick and physically heavy, making it hard for the needle to go through. You can also use sangin metaphorically, just like in English, for heavy traffic or a heavy silence.