Breakdown of اینکه این خویشاوندا تبار مشترک دارن یه راز جالبه.
است
is
این
this
یکyek
one / a, an
داشتنdâshtan
to have
Questions & Answers about اینکه این خویشاوندا تبار مشترک دارن یه راز جالبه.
How does in-ke function in this sentence?
in-ke literally means "this that," but here it translates to "the fact that." It takes the entire clause in khishavand-a tabar-e moshtarak daran (these relatives have a shared lineage) and packages it into a single noun phrase. That entire nominal clause then acts as the subject of the main sentence: "[The fact that...] is an interesting secret."
Why is the plural of relative written as khishavand-a instead of khishavand-ha?
In spoken and informal Farsi, the standard plural suffix -ha is very often shortened to just -a when it follows a consonant. So, khishavand-ha becomes khishavand-a. This entire sentence is written in a conversational, spoken style.
Where is the main verb "is" in this sentence?
It is attached to the very end of the sentence as the enclitic -e in jaleb-e. In formal written Farsi, this would be the separate word ast (is), making the phrase raz-e jaleb ast. In spoken Farsi, ast shrinks to an -e sound and simply attaches to the end of the previous word.
How do we know to say tabar-e moshtarak when there is no linking letter written?