Breakdown of Onun rutini monoton bir metni yinelemekten ve yakınmaktan ibaret.
bir
a / an
o
that / he / she / it
ve
and
metin
text
Questions & Answers about Onun rutini monoton bir metni yinelemekten ve yakınmaktan ibaret.
Why is it metni (with the accusative case) if the sentence uses bir (a text)? Doesn't bir usually mean the object is indefinite and takes no case?
Normally, indefinite objects with bir don't take the accusative case. However, when you use bir with the accusative ending, like in bir metni, you are referring to a specific or certain text rather than just any random text in the world. It implies she has a particular monotonous text she always repeats. Also, notice the vowel drop from the root word metin to metni.
Why do the verbs yinelemek and yakınmak have the ablative endings -ten and -tan?
They take the ablative case (from) because of the word ibaret (consisting of). The grammatical structure for "to consist of something" in Turkish is always [something]-den/dan ibaret. Since the things her routine consists of are verbs (repeating and complaining), we use their infinitive forms and add the ablative endings to get yinelemekten and yakınmaktan.
Could I use the possessive verbal noun here, like yinelemesinden ve yakınmasından, since it is her routine?
You don't need to, and it would sound unnatural here. Because the overarching subject is already "her routine" (onun rutini), it's understood that she is the one doing the repeating and complaining. Using the standard infinitive (-mak/-mek) plus the ablative case is the most natural way to connect these verbs to ibaret.