Learn Turkish: Bu zor görevi kabul ettin mi? - Did you accept this difficult task?

In the past tense, the personal ending (the -n for "you") attaches directly to the verb along with the past tense suffix (et-ti-n). The question particle mi stands alone at the very end. This is a big difference from the present continuous tense you learned earlier, where the personal ending attaches to the question particle (like ediyor musun?).

Why didn't the t in the verb etmek change to a d here, like it does in kabul ediyorsun?

The verb etmek changes its t to a d when the next suffix starts with a vowel (like the -i in -iyor). However, the past tense suffix here starts with a consonant (-ti). Because it starts with a consonant, the t in et stays exactly as it is, giving us ettin.

Why is there an -i at the end of görevi?

The word görev means "task" or "duty". The -i is the specific direct object ending (the accusative case). Because the sentence points to a specific task using the word bu (this), we must add this ending to show that bu zor görev is the specific thing being accepted.

What is the literal meaning of kabul ettin?