Suppose that (tut ki / diyelim ki)

Setting the Scene: "Suppose that"

To propose a hypothetical scenario, start your sentence with tut ki (suppose that) or diyelim ki (let's say that).

To set up the imaginary event, the verb in the hypothetical clause usually takes the simple past tense, just like in English (e.g., "Suppose you won"). The consequence clause describing what you would do takes the aorist past tense (-ırdı / -erdi).

Suppose that you won the lottery, what would you do?
Tut ki sana piyango çıktı, ne yapardın?
Let's say that the jackpot in this draw went to you.
Diyelim ki bu çekilişte büyük ikramiye sana çıktı.

Assuming with "Farz et ki"

You can also use farz et ki (assume that). It functions exactly like tut ki and diyelim ki.

Suppose that you won the jackpot, you would go crazy from shock!
Farz et ki büyük ikramiyeyi kazandın, şoktan çıldırırdın!
Suppose that you bought an old waterside mansion by the sea.
Farz et ki deniz kenarında eski bir yalı satın aldın.

Present States and Negative Consequences

For a hypothetical current state of being (like "Suppose you are rich"), attach present-tense personal endings directly to adjectives or nouns.

Suppose that you are very rich; would you buy a luxury yacht or a private jet?
Tut ki çok zenginsin; lüks bir yat mı yoksa özel bir jet mi alırdın?

To talk about what you would not do, use the negative aorist past (-mazdı / -mezdi) in the consequence clause.

Let's say you won millions from the lottery, you wouldn't buy that old waterside mansion.
Diyelim ki piyangodan milyonlar kazandın, o eski yalıyı almazdın.
Suppose that you won the lottery, you wouldn't leave work immediately.
Tut ki sana piyango çıktı, işten hemen ayrılmazdın.