Learn Turkish: O yarın geliyor. - She is coming tomorrow.

Just like in English when we say 'She is coming tomorrow,' Turkish frequently uses the present continuous tense (-yor) for fixed future plans. The time word yarın (tomorrow) lets the listener know the action has not happened yet.

How do we know O means 'she' and not 'he' or 'it'?

We do not know just from this sentence! Turkish does not have gendered pronouns, so O translates to 'he', 'she', or 'it'. The translation 'she' is used here as an example, but in a real conversation, you would know who is being talked about from the context.

What are the pieces that make up the verb geliyor?

It starts with the verb root gel- (come). To add the present continuous suffix -yor, we need a matching vowel in between to make it easy to say. Based on vowel harmony rules, we use i, giving us geliyor. There is no extra ending after -yor because the subject is 'he', 'she', or 'it'.

Could I put the word yarın at the very beginning of the sentence?

Yes, you can say Yarın o geliyor. Time words are very flexible in Turkish. Putting yarın right before the verb, like in this sentence, puts a little more focus on the fact that she is coming tomorrow specifically.