Present and Past Statements: -DIk
In English, we connect facts to verbs of knowledge, perception, or communication using "that" (e.g., "She denied that she committed the crime").
In Turkish, you express this by turning the action into a noun clause using the -DIk suffix. This form covers both past and present facts. To build it, add -DIk to the verb stem, followed by a possessive suffix to show who is performing the action inside the clause. Note that the k usually softens to ğ before the possessive vowel.
Because this clause acts as a noun, it takes whichever case ending the main verb requires. Usually, this is the accusative case (-(y)i, -(y)ı, etc.) because the clause is the direct object of verbs like "confess", "deny", or "prove".
işle- (to commit) + -diğ- (factive) + -i (his/her) + -ni (buffer n + accusative i) = işlediğini (that he/she committed)
| He denied that he committed the crime. | Suçu işlediğini inkâr etti. |
| The criminal confessed that he did this intentionally. | Suçlu, bunu kasten yaptığını itiraf etti. |
The Subject of the Clause
If the subject of the "that" clause is explicitly stated (like "the killer" in "that the killer left a trace"), it takes the genitive case suffix. The verb at the end of the clause will have a matching possessive suffix, forming a possessor-possessed relationship (literally translating to "the killer's leaving").
| We proved that the killer secretly left a trace. | Katilin gizlice iz bıraktığını kanıtladık. |
| Do you know that the detective is interrogating the suspect? | Dedektifin şüpheliyi sorguladığını biliyor musun? |
Negative Factive Clauses
To state that an action did not happen, place the negative suffix (-mA) directly after the verb stem, right before the -DIk suffix.
| We understand that she did not commit the crime intentionally. | Suçu kasten işlemediğini anlıyoruz. |
Other Case Endings
Factive clauses always follow the case requirements of the main verb. While verbs like itiraf etmek (to confess) or inkâr etmek (to deny) take the accusative case, a verb like inanmak (to believe) requires the dative case (-(y)A).
Therefore, the factive clause must end with a dative suffix rather than an accusative one.
| They didn't believe that he committed this crime. | Onun bu suçu işlediğine inanmadılar. |
Multiple Actions in a Clause
When describing multiple established facts or actions, you can apply the -DIk structure to each verb and link them with ve (and).
| I saw that the police interrogated and arrested the suspect. | Polisin şüpheliyi sorguladığını ve tutukladığını gördüm. |