Learn Hardcore Turkish: Sonraki otobüs yakında gelecek.

sonraki breaks down into two parts:
• sonra – a noun meaning after or later
• -ki – a relational adjective suffix meaning the one related to…
When you combine them, sonraki literally means the one that comes after, i.e. next.

Why isn’t there a word for the in Sonraki otobüs yakında gelecek?

Turkish has no definite or indefinite articles like a or the. Noun phrases can be definite simply by context or by using demonstratives or possessive constructions. Here, sonraki otobüs is understood as the next bus without a separate article.

What part of speech is yakında, and how is it formed?

yakında is an adverb meaning soon or shortly. It comes from the adjective yakın (near) plus the locative case suffix -da. In Turkish, putting an adjective in the locative often creates a time‐related adverb.

What tense and person is gelecek, and why don’t we see a separate subject pronoun?