Klingon uses two special pronouns - 'e' and net - to link two sentences, where the second sentence refers back to the first. These constructions are most common with verbs of thinking, seeing, or knowing. The pronoun acts as the object of the second verb, and the verb must take a third-person singular object prefix.

Using 'e'

The pronoun 'e' means "that" (as in “they know that...”) and is used when the subject of the second verb is specific (he, she, we, etc.). This results in two full sentences: the first states an action, the second comments on or reacts to it.

• qama'pu' DIHoH 'e' luSov - They know we kill prisoners.  (qama'pu' - prisoners; DIHoH - we kill them; luSov - they know it)

• yaS qIppu' 'e' vIlegh - I saw him/her hit the officer.  (yaS - officer; qIppu' - he/she hit; vIlegh - I see it)

Note: The second verb never takes an aspect suffix. If there is continuous or perfective meaning, it's marked only on the first verb (e.g., qIppu' with -pu' for perfective). This rule does not apply to any other verbs in the second sentence, only the verb with 'e' or net as the object that is then a clause within a larger sentence:

• yaS qIppu' 'e' vIlegh neqratlhwI' vIlo'taHmo' - Because I was wearing my glasses, I saw that him/her hit the officer.

Using net

The pronoun net is used instead of 'e' when the subject of the second verb is general or indefinite—typically translated as “one” or “people in general.”

• qama'pu' DIHoH net Sov - One knows we kill prisoners.

• Qu'vaD lI' net tu'bej - One certainly finds it useful for the mission.

With Indefinite Subject -lu'

If the first sentence has an indefinite subject marked with -lu', and the second sentence refers to the same indefinite subject, you can use 'e' Xlu' instead of net:

• yInlu'taH 'e' bajnISlu' - One must earn one's continued survival.

With neH ("want")

When the second verb is neH (“want”), 'e' and net are not used. The two clauses simply follow one another:

• jIQong vIneH - I want to sleep.

• qalegh vIneH - I want to see you.

• Dalegh vIneH - I want you to see him/her.

• qama'pu' vIjonta' vIneH - I wanted to capture prisoners.

Again, only the first verb (vIjonta') takes an aspect suffix. The second verb (vIneH) stays neutral in time.

With Verbs of Saying

When reporting speech (say, tell, ask, etc.), 'e' and net are not used. The quoted sentence simply follows (or precedes) the verb of saying.

• qaja'pu' HIqaghQo' - I told you, "Don't interrupt me!"

• HIqaghQo' qaja'pu' - "Don't interrupt me!" I told you.

With Adverbials

Be sure to put the adverbial in front of the verb that it applies to:

• nom bIqet 'e' vISov - I know that you run fast

• bIqet nom 'e' vISov - I quickly know that you run

• chaq chab DaSop 'e' vIpoQ - I require you to maybe eat pie

• chab DaSop chaq 'e' vIpoQ - Perhaps I require you to eat pie

With other clauses made with type-9 suffixes

When combing SAO with other clauses, be sure to put them on the correct "side" of the 'e' or net (before or after). Do not split the clause across the SAO. Clauses that interacted with the verb that has the sentence as an object should be in that same sentence. The 'e' or net refers to the whole sentence before it. Compare these:

• juH qachlIj DacheghlaH 'e' vISov paq vIlaDmo' - Because I read the book, I know that you can return home
  Literally: You can return home. I know that because I read the book
  In this sentence, the knowledge about returning came from the book.

• paq vIlaDmo' juH qachlIj DacheghlaH 'e' vISov - I know that because I read the book you can return home

  Literally: Because I read the book you can return home. I know that

  In this sentence, the ability to return home came from the book.

• juH qachlIj DacheghlaH 'e' vISovmo' jIQuchqu' - Because I know you can return home, I am very happy

  Literally: You can return home. Because I know that, I am very happy

Some examples from the paq'batlh:

• Suv 'e' mevDI' tlhutlhmeH SopmeH lopmeH pa' chegh SuvwI'pu' - As soon as they stop fighting, warriors return to the place for celebrating, for eating, for drinking.

• jatlh 'e' mevDI' nuvpu' mejmoH ghaH - As soon as he stops talking, he causes the people to leave

• jIlay'DI' reH batlh jIpabchugh Qapla'meywIj Hoch vIta'ta' 'e' DaHar'a' - When I promise, if I always follow the rules honorably, I will accomplish all my successes, do you believe that?

And if it's the wrong way round:

• ❌ jIQuchqu' juH qachlIj DacheghlaH 'e' vISovmo' - Ungrammatical.
  Literally: I am very happy. You can return home. Because I know that.... missing rest of sentence

In this sentence, the type-9 suffix is on the verb Sov so the verb that goes with it should be on the same side as it, not on the other side of another sentence.

Do note that as with most "rules", this can be violated for wordplay, poetry, or other kinds of creative writing. Even then, care should be taken to make sure the resulting construction does not have unintended meanings.