Learn Hardcore Turkish: Masada peçete var. - There is a napkin on the table.

It’s the locative case, meaning “in/on/at.” So masa + da = “on/at the table.” Turkish uses one locative ending for several English prepositions depending on context.

How do I choose between -da, -de, -ta, -te?

Front/back vowel harmony: after words with a, ı, o, u → use -da/-ta; after e, i, ö, ü → use -de/-te.
Voicing: if the word ends in a voiceless consonant (f, s, t, k, ç, ş, h, p), the d becomes t.

Examples:

masa → masada
ev → evde
park → parkta
ağaç → ağaçta
şehir → şehirde

Where is the verb here? What is var?

Var is an existential predicate meaning “there is/are.” Turkish doesn’t use a separate “to be” in the simple present. So Masada peçete var literally means “On the table, napkin exists.”

How would I say “The napkin is on the table” (definite), not “There is a napkin on the table”?

Say Peçete masada. With a definite subject, Turkish uses a simple nominal sentence (no var). Compare:

Masada peçete var. = There is a (some) napkin on the table. (indefinite)
Peçete masada. = The napkin is on the table. (definite/known)

Why is there no “a” (article) before peçete? Can I add bir?

Turkish has no articles like “a/the.” Indefiniteness is usually unmarked. You can add bir:

Masada bir peçete var. This often emphasizes “one napkin” or makes the indefiniteness explicit. With neutral stress, it’s like English “a”; with stressed bir, it means “one.”

How do I negate this? Is it var değil?

Use yok, not “var değil”:

Masada peçete yok. = There is no napkin on the table. Past: Masada peçete yoktu. Never say “var değil.”

How do I ask “Is there a napkin on the table?”

Masada peçete var mı? The question particle harmonizes: mı/mi/mu/mü. Answers are typically just Var. or Yok.

How do I say “There are napkins on the table”? Do I need the plural?

To be explicit, use the plural:

Masada peçeteler var. Note: a bare singular with var can be number-neutral in context (e.g., Sınıfta öğrenci var. = “There are student(s) in the class”), but adding -ler/-lar removes ambiguity.

How do I put this in the past, reported, or future?

Past: Masada peçete vardı. (There was a napkin.)
Past negative: Masada peçete yoktu.
Reported (evidential): Masada peçete varmış.
Future: Masada peçete olacak.
Formal/general assertion: Masada peçete vardır.

Why is the location first? Can I change the word order?

Turkish tends to put known/background information (the location/topic) first and new information last. Masada peçete var answers “What’s on the table?” If you’re answering “Where is the napkin?” you’d say Peçete masada. You can juggle order for emphasis, but the patterns above are the most natural.

Does -da mean “in,” “on,” or “at”?

All of the above, depending on the noun and context. Masada usually corresponds to “on the table,” but okulda can be “at school,” kutuda “in the box.” English splits these with different prepositions; Turkish uses the locative for all.

What’s the difference between Masada and Masanın üstünde/üzerinde?

Masada = at/on the table (general location).
Masanın üstünde/üzerinde = on top of the table (explicit surface). Morphology: masa-nın üst-ü-n-de (table-GEN top-3SG.POSS-LOC). The -n- is a buffer consonant.

Is the -da here the same as the particle da/de meaning “also/too”?

No. The locative -da/-de is a suffix attached to a noun (no space) and can become -ta/-te. The particle da/de (“also/too”) is written separately, follows vowel harmony, and never turns into ta/te:

Locative: Masada peçete var.
Particle: Masada da peçete var. (“There is a napkin on the table, too.”)

How do I express possession with var?

Use a locative-marked possessor or a possessed noun:

Bende peçete var. = I have a napkin. (“On me/with me, there is a napkin.”)
Benim peçetem var. = I have my napkin. (Possessive suffix -m on the noun.) Negation: Bende peçete yok.

Does var change with plural or person?

No. Var is invariable. Don’t say “varlar.”

Masada peçete var.
Masada peçeteler var. In both, var stays the same.