Breakdown of Kalem çantanın içinde mi?
kalem
pen
çanta
bag
mi
question particle (mı/mi/mu/mü)
içinde
inside, within
Questions & Answers about Kalem çantanın içinde mi?
Why does "the bag" change to çantanın here?
What do the suffixes on içinde mean?
It breaks down into three parts attached to the root noun iç (interior). The -i is the possessive suffix matching the bag ("its interior"). The -de is the locative suffix meaning "at" or "in". The -n- in the middle is simply a buffer letter used when adding a location suffix to a possessive suffix.
How do we know it means "the pen" and not "a pen" if there is no word for "the"?
Turkish does not have a definite article like "the". Since kalem is the subject at the start of the sentence, it is naturally understood as specific ("the pen"). If we meant "a pen", we would use the word bir and say Bir kalem çantanın içinde mi?.
Why is the question particle mi used here instead of mı, mu, or mü?
The yes/no question particle follows 4-way vowel harmony based on the word right before it. The last vowel in içinde is "e". According to vowel harmony rules, an "e" or "i" in the previous syllable means the particle becomes mi.