Learn Hardcore Turkish: Madem stant kurulumu bitti, sen de demo sunumunu başlatmalısın. - Since the booth setup is finished, you should start your demo presentation as well.

madem is a subordinating conjunction meaning “since / given that / now that.” It introduces a premise the speaker assumes is already true. In Madem stant kurulumu bitti, it conveys “now that the booth installation is finished,” setting up the reason for the follow-up action.

Why is stant spelled with a t at the end and what does it mean here?

stant is a loanword from English stand (meaning “booth” or “stall”). Turkish phonology often devoices final voiced consonants (so /d/ → /t/), and the word refers to an exhibition or trade-show booth in this context.

Why is kurulumu written with -u at the end, and what role does this suffix play?

The -u on kurulumu is the 3rd person singular possessive suffix. It makes kurulum (“installation”) into “its installation” or “the installation of ….” In stant kurulumu, it literally means “the installation of the booth.” In Turkish genitive–possessive compounds, the possessed noun (here kurulum) takes a possessive suffix.

In demo sunumunu, why are there two us at the end and what do they represent?

They are two separate suffixes:

-un = 2nd person singular possessive (“your demo presentation”)
-u = accusative (definite direct object) marker
Vowel harmony turns both into u, so demo sunumunu means “your demo presentation” as the definite object you must start.

What is the function of de in sen de and how is it different from the case suffix -de?

In sen de, de is a particle meaning “also / too,” written separately. It adds the sense “you, too, should start….” The locative case suffix -de (“in / on / at”) attaches directly to nouns and obeys vowel harmony (e.g. evde, okulda). They look alike but have different roles and spelling rules.

What does the suffix -malı express in başlatmalısın, and why is başlatmak used instead of başlamak?

The suffix -malı (here -malısın) expresses obligation or necessity (“must/should”). Başlatmak is the causative/transitive form of başlamak (“to start”), so it takes a direct object (demo sunumunu). If you used the intransitive başlamak, you’d say demo sunumuna başlamalısın (with the dative -a).

How is madem different from çünkü (“because”)?

While çünkü simply introduces a reason (“because…”), madem conveys “since/given that” with an element of assumed acceptance or obviousness. Madem often has a rhetorical or motivational flavor, implying “given that we all agree on this point…”

Is the pronoun sen necessary in this sentence, or can it be omitted?

The pronoun sen is not mandatory because the verb ending -sın already marks 2nd person singular. You can drop sen for brevity or formality. Including sen adds emphasis or clarity but isn’t required.