Breakdown of hyudaepon baeteoriga ppareuge jureodeureoyo.
~가~ga
subject particle
휴대폰hyudaepon
cell phone
빠르게ppareuge
quickly
배터리baeteori
battery
Questions & Answers about hyudaepon baeteoriga ppareuge jureodeureoyo.
What exactly is the subject here, and why is the marker on 배터리 and not on 휴대폰?
The subject is the whole noun phrase 휴대폰 배터리 (phone battery), and the subject marker -가 attaches to the head noun 배터리. 휴대폰 is just modifying 배터리 (like “phone battery” in English), so you get 휴대폰 배터리가 ….
Can I say 휴대폰의 배터리가 instead? When would I use 의?
Yes: 휴대폰의 배터리가 … is grammatically fine and sounds a bit more formal or explanatory. In everyday speech, Koreans usually drop 의 in N+N relationships when the meaning is obvious, so 휴대폰 배터리 is more natural.
Why is it 이/가 here? Could I use 은/는 instead, and what would change?
You can use 은/는 to topicalize: 휴대폰 배터리는 빠르게 줄어들어요. That shifts the focus to “as for the phone battery,” often implying contrast (e.g., compared to other phones or other parts). 이/가 simply marks the grammatical subject without that topical/contrastive nuance.
Why isn’t there an object marker (을/를)? Isn’t the battery what’s changing?
The verb 줄어들다 is intransitive (“to decrease, diminish”), so there’s no direct object. The battery itself is the subject undergoing the change: 배터리가 줄어들어요. If you used a transitive verb like 줄이다 (“to reduce”), you’d need an object: 배터리 사용을 줄여요 (“I reduce battery usage”).
Is 줄어들다 the most natural verb for batteries? Should I say 닳다 instead?