Learn Hardcore Turkish: Anahtarımı masanın altına koydum.

In Turkish you often omit subject pronouns because the verb ending already marks person and number. Here koydum = koy (put) + -du (past tense) + -m (1st person singular), so “I put” is clear without adding ben.

What does the suffix -ımı in anahtarımı represent?

It combines two suffixes on anahtar (key):
• -ım = 1st person singular possessive (“my”)
• -ı = accusative case marker for a definite object
So anahtarımı literally is anahtar + -ım + -ı = “my key” (as the definite object).

Why is masanın in the genitive case?

Masanın = masa (table) + -n + -ın, where -ın is the 3rd person singular genitive (“of”). You need genitive on masa because it owns altı (“its underside”) in the phrase “the underside of the table.”

What is altına, and how is it formed?

Altına breaks down as:
• alt = “bottom” or “underside” (a relational noun)
• -ı = 3rd person singular possessive (“its underside”)
• -na = dative case on a possessed noun (“toward/into”)
Putting them together: altı = “its underside,” and altına = “to under it,” i.e. “under” with motion.

Why is the dative suffix -na (with an n) used instead of just -a?

On unpossessed nouns you use -a/-e for the dative. But on possessed nouns (those with a genitive + possessive already) you use -na/-ne. Since altı is possessed by masanın, it takes -na: altı + -na = altına.

Why is it altına (dative) rather than altında (locative)?

-a/-e (dative) signals motion toward a place – “into/under.” -da/-de (locative) signals static location – “in/on/under.” Because koydum (“I put”) implies movement to a place, you use the dative altına.

Why does the verb koydum come at the end of the sentence?

Standard Turkish word order is Subject-Object-Verb (SOV). Even though ben is dropped, anahtarımı (object) and masanın altına (adverbial phrase) precede the verb koydum.

What tense and person does koydum express?

koydum = koy (put) + -du (simple/past definite tense) + -m (1st person singular). It means “I put.”

Can I omit the genitive -ın in masanın and say masa altına koydum?

Colloquially you might hear masa altına koydum, but the standard, precise way is masanın altına (“under the table”). The genitive+possessive clarifies “the underside of the table.”