Learn Turkish: Eskizi bitirdiysen boyamaya başlayacağız. - If you have finished the sketch, we will start painting.

It combines the verb bitir- (to finish) with the definite past suffix -di, the conditional copula -y-se, and the personal ending -n (you). We use the past tense here because the condition (finishing the sketch) must be completed before the future action (starting to paint) can happen. It translates perfectly to 'if you have finished'.

I learned that 'to finish' is bitmek. Why do we use bitirmek here?

Bitmek is intransitive, meaning something ends on its own (like a movie or a class). Bitirmek adds the causative suffix -ir, making it transitive, which means 'to finish something'. Since the person is finishing a specific object (the sketch), we must use bitirmek.

Why does boyamaya end with -a?

The verb başlamak (to start) always requires the dative case (-e or -a) for the action or thing you are starting. Here, boyama is the verbal noun (painting), and we add the buffer -y- and the dative -a to connect it to başlayacağız.

Why does eskiz (sketch) take the -i suffix here?