Learn Turkish: Müdür projeyi onayladı mı? - Did the manager approve the project?

To ask a yes/no question in the past tense, we conjugate the verb in the past tense first (onayladı) and then add the question particle as a separate word (mı). The particle follows 4-way vowel harmony, so it becomes mı to match the final ı in onayladı.

Why is the word for project written as projeyi instead of just proje?

Proje means project. Because the project is the specific thing receiving the action (the direct object of the verb), it takes the accusative case ending -i. Since proje ends in a vowel, we use the buffer letter -y- to connect them, making it projeyi.

Does the verb onayladı have a personal ending for the manager?

Not a visible one! The dictionary form is onaylamak (to approve). We take the stem onayla- and add the past tense suffix -dı. Because the subject is third-person singular (he/she/it), there is no extra personal suffix.

Why is the question particle mı completely bare here?