Learn Turkish: Şu dönemeçten şatoya doğru döneceğiz, yoksa karanlıkta kalacağız. - From that bend we will turn towards the castle, otherwise we will stay in the dark.

The postposition doğru means "towards" when it follows a noun in the dative case (the "to" or "for" direction). Here, we add the dative suffix -ya to şato (castle) because it ends in a vowel. Together, şatoya doğru gives us "towards the castle."

Are dönemeçten (from the bend) and döneceğiz (we will turn) related words?

Yes, they both share the verb root dön- (to turn). A dönemeç is a noun meaning a physical bend or curve in a road. In this sentence, it takes the ablative (from) suffix -ten, giving us "from the bend."

I learned that yok means "there isn't". How does yoksa mean "otherwise" here?

Yoksa is a combination of yok (non-existent) and the conditional suffix -sa (if). Literally, it translates to "if not" or "if it is not the case." It is very commonly used as the conjunction "otherwise" or "or else" to connect two parts of a sentence.

Why is there a ğ in the future tense verbs döneceğiz and kalacağız?