Two Klingon sentences can be combined into a compound sentence using conjunctions such as 'ej ("and"), 'ach ("but"), qoj ("and/or"), or pagh ("either/or"). Each part of a compound sentence must still be able to stand alone as a complete sentence.

• jISoptaH 'ej QongtaH - I am eating, and she is sleeping.
• jISoptaH 'ach QongtaH - I am eating, but he is sleeping.
• bISoptaH qoj bItlhutlhtaH - You are eating and/or you are drinking.
• bISoptaH pagh bItlhutlhtaH - You are either eating or you are drinking (but not both).

In English you can drop pronouns that would be repeated, so you could say "You are eating and/or drinking," Klingon explicitly repeats the prefixes as demonstrated above.

When nouns (rather than just prefixes) are used as subjects or objects, Klingon typically repeats these nouns in full:

• yaS legh puq 'ej yaS qIp puq - The child sees the officer and the child hits the officer.
  (Shorter English translation: "The child sees and hits the officer.")

Alternatively, pronouns can replace repeated nouns in the second part of the sentence:

• yaS legh puq 'ej ghaH qIp ghaH - The child sees the officer and she hits him.

When context clearly indicates meaning, pronouns can be omitted:

• yaS vIlegh 'ej vIqIp - I see and hit the officer.
  (Or more explicitly: "I see the officer and I hit him/her.")