Question 1

How exactly does soruşturduğum kadarıyla break down to mean "as far as I investigated"?

Accepted Answer

It combines the verb soruşturmak (to investigate) with the participle suffix -dık (which becomes -duğ due to consonant mutation and vowel harmony) and the first-person possessive -um (my). Adding kadarıyla creates the structure meaning "to the extent of my investigating" or "as far as I investigated".

Question 2

Why does kadar become kadarıyla in this grammar structure?

Accepted Answer

The word kadar (amount/extent) takes the third-person possessive suffix -ı to link back to the preceding action, followed by the buffer -y- and the instrumental suffix -la (with/by). Literally, the phrase means "with its extent." You will see this fixed kadarıyla form in almost all "as far as [subject] knows/sees" expressions.

Question 3

Could I use araştırdığım kadarıyla instead of soruşturduğum kadarıyla here?

Accepted Answer

Yes, but it changes the nuance slightly. Soruşturmak specifically implies a formal inquiry, interrogation, or official police-style investigation. Araştırmak is used for general research or looking into a topic. Since this sentence is about discovering something isn't a "simple accident," the detective-like soruşturmak fits perfectly.

Question 4

Just as a quick refresher, why is it basit bir kaza and not bir basit kaza?

Accepted Answer

In Turkish, when an adjective modifies an indefinite noun, the article bir (a/an) must be placed between the adjective and the noun. So "a simple accident" is always basit bir kaza. If you said bir basit kaza, it would sound awkwardly like you were emphasizing the number one: "one simple accident."

Soruşturduğum kadarıyla, bu sadece basit bir kaza değil.

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