Havanın aniden soğuması, astımının kötüleşmesine sebep oldu.

Breakdown of Havanın aniden soğuması, astımının kötüleşmesine sebep oldu.

hava
weather
aniden
suddenly
kötüleşmek
to get worse
soğumak
to get cold / to cool down
sebep olmak
to cause
astım
asthma

Questions & Answers about Havanın aniden soğuması, astımının kötüleşmesine sebep oldu.

Why does kötüleşmesine take the dative case (-e) at the end?
The verb phrase sebep olmak (to cause / to be the reason for) always requires the dative case on the thing that is caused. Here, the caused event is the worsening (kötüleşmesi). To attach the dative suffix -e to a 3rd person possessive, we use the buffer consonant -n-, resulting in kötüleşmesine.
Why do we say havanın soğuması instead of just hava soğuması?
When we turn a complete action like "The weather gets cold" into a noun phrase ("the weather's getting cold"), the subject (hava) takes the genitive case (havanın) and the verb takes a verbal noun suffix plus a possessive ending (soğuma-sı). This creates a specific factive clause acting as the subject of the main sentence.
Let's break down the suffixes on astımının. Where is the "his" in this word?
The root is astım (asthma). The first is the 3rd person possessive, making it astımı (his asthma). The final -nın is the genitive case ending ("'s"). Together, astımının literally means "his asthma's", which links to the following word kötüleşmesi to mean "his asthma's worsening".
Could we use yol açtı instead of sebep oldu here?
Yes, yol açtı (literally "opened the road to") is practically interchangeable with sebep oldu in this sentence. Both verbs require the dative case and connect a cause to an effect. Sebep oldu is slightly more direct, while yol açtı can sometimes imply triggering a chain of events, but both are perfect for expressing "caused" here.

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