Conjunctions (bağlaçlar) are words that connect words, phrases, clauses, or sentences. They are essential for creating coherent and complex expressions.

Coordinating Conjunctions (Eşgüdümlü Bağlaçlar):

These connect elements of equal grammatical rank.

• ve (and): The most common conjunction for joining.
  Example: elma ve armut (apple and pear), Geldi ve oturdu. (He came and sat down.)
• ile (and): Similar to 've', but can also mean 'with'. Often suffixed as -(y)le/-(y)la. More common for joining nouns.
  Example: anne ile baba / anneyle baba (mother and father)
• ama / fakat / lakin (but, however): Introduce a contrast or opposition.
  Example: Çalıştım ama başaramadım. (I studied, but I couldn't succeed.)
• veya / ya da / yahut (or): Present alternatives.
  Example: Çay veya kahve ister misin? (Do you want tea or coffee?)
• hem ... hem (de) ... (both ... and ...):
  Example: Hem güzel hem de akıllı. (She is both beautiful and smart.)
• ne ... ne (de) ... (neither ... nor ...): Used with a positive verb form to express a double negative.
  Example: Ne geldi ne de aradı. (He neither came nor called.)
• çünkü / zira (because): Introduce a reason or cause.
  Example: Gelemedim çünkü hastaydım. (I couldn't come because I was sick.)
• yani (that is, in other words, so): Clarifies or rephrases.
  Example: Vakit yok, yani acele etmeliyiz. (There's no time, so we must hurry.)

Subordinating Conjunctions (Bağımlı Bağlaçlar):

These connect a dependent clause to an independent (main) clause. Many subordinating relationships in Turkish are also handled by verbal nouns, participles, and gerunds.

• ki (that, which, who): A very versatile particle, often introduces subordinate clauses, relative clauses, or reported speech.
  Example: Biliyorum ki haklısın. (I know that you are right.)
  Example: Öyle bir kitap ki herkes okumalı. (It's such a book that everyone should read.)
• eğer / şayet (if): Often optional when the conditional mood (-se/-sa) is used on the verb.
  Example: Eğer istersen, gelebilirim. (If you want, I can come.)
• madem(ki) (since, seeing that, now that):
  Example: Mademki geldin, içeri gir. (Since you've come, come inside.)

This is not an exhaustive list, but covers many commonly used conjunctions.