Tavan çok yüksek.

The ceiling is very high.

Breakdown of Tavan çok yüksek.

• olmak: to be
• çok: very
• yüksek: high
• tavan: the ceiling

Questions & Answers about Tavan çok yüksek.

Why is there no word for “is” in Tavan çok yüksek?

In Turkish, the verb to be (olmak) is usually omitted in simple present tense. The sentence literally reads Ceiling very high, and the “is” is understood implicitly. If you wanted to add it explicitly (more formally), you could use the copula suffix -dir:
Tavan çok yüksektir.

Why does the adjective yüksek come after tavan instead of before it?

Here yüksek is functioning as a predicate adjective (describing the subject). In Turkish, predicate adjectives and predicate nouns follow the subject (and any adverbs). If you want to use yüksek attributively (directly modifying the noun), it precedes the noun:
yüksek tavan → “high ceiling” (noun phrase)

What role does çok play in this sentence?

Çok is an adverb meaning very when it modifies an adjective. In Tavan çok yüksek, it intensifies yüksek, so it means very high. (With verbs, çok means “a lot,” and with countable nouns it can mean “many,” but here it’s just an intensifier.)

How would I ask “Is the ceiling very high?” in Turkish?

Add the question particle mi after the adjective, with a space. It harmonizes as mi/mı/mu/mü according to the last vowel (here e → mi):
Tavan çok yüksek mi?
Literally: “Ceiling very high ?”

How do I make this sentence negative (“The ceiling is not very high”)?

Place değil (“not”) after the adjective:
Tavan çok yüksek değil.
Literally: “Ceiling very high not.”

How can I say “My room’s ceiling is very high”?

Use the genitive + possessive construction:
Odamın tavanı çok yüksek.
Here oda-nın = “of my room,” and tavan-ı = “its ceiling.”

How do I say “This ceiling is very high”?

Simply add the demonstrative bu before the noun:
Bu tavan çok yüksek.
Turkish has no articles, so bu covers “this.”

How do I express a specific height, like “The ceiling is 5 meters high”?

Put the number + unit in nominative, then the adjective:
Tavan beş metre yüksek.
Alternatively, to use it attributively you can say:
beş metrelik tavan → “a five-meter-high ceiling.”

How do I pronounce Tavan çok yüksek, and where is the stress?

In IPA it’s roughly [taˈvan tʃok ˈjyksek], with stress on the last syllable of each word. A simple English-style guide is:
tah-VAHN chok YOOK-sek