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Questions & Answers about Tüm anketi okudum.
The current lesson teaches hepsi (all of it). Could I say Anketin hepsini okudum instead?
Yes! Both mean the same thing, but they use different grammar. Tüm acts as an adjective placed right before the noun (tüm anket). Hepsi acts as a pronoun, so you have to use the possessive structure: anketin hepsi (all of the survey). Because it is a specific direct object, you then add the accusative case to make it anketin hepsini.
Why doesn't tüm take a possessive suffix like the words in this lesson (such as çoğu or hepsi)?
Because tüm is simply an adjective meaning "whole" or "all". It describes the noun directly without needing extra suffixes. Words like hepsi (all of them) and çoğu (most of them) are pronouns, so they need possessive suffixes to show what group they are referring to.
Why does anket (survey) have an -i at the end?
That is the accusative case suffix. You use it when an action is done to a specific direct object. Because you read a specific survey, anket needs the -i suffix to show it is receiving the action of okudum (I read).
Could I use bütün instead of tüm in this sentence?