60426
崩す is a transitive verb so it should have a doer(omitted or not)

In this sentence, the doer seems to be 彼, he destroyed himself with alcohol:

> 酒で彼は身を崩した。 Drink brought about his downfall.

But in the following sentence, it doesn't work well to say that 彼 is the doer
since it seems that he is not voluntarily ill:

> 彼は少し体調を崩して, 今週は学校を休んでいる. He has been off school with a slight illness this
> week.

Is the doer omitted in this sentence? If yes, is a sentence like 彼は風邪が体調を崩す
correct to say that he is ill because of a cold?

I don't find any occurrence on google search so I think it is not natural but
I don't know why in this case?
CC BY-SA 4.0
2018-07-26T15:46:22.020
60425
2018-07-26T17:05:37.167
25980
question
grammar
Who is the doer when we use the verb 崩す?
> 「彼{かれ}は少{すこ}し体調{たいちょう}を崩{くず}して, 今週{こんしゅう}は学校{がっこう}を休{やす}んでいる。」

Without a doubt, the subject/doer of the verb phrase 「体調を崩す」 would be 「彼」, but
that is not to say that 「彼」 voluntarily chose to become ill. You might have to
forget the translated English word "destroy" here because that could fool you
in your attempt to determine the "doer".

「彼」 is the subject/doer of both actions 「体調を崩す」 and 「学校を休む」 in this sentence.
There is no unmentioned subject/doer here.

> "He has become slightly sick and has been absent from school this week."

You ask:

> is a sentence like 彼は風邪{かぜ} **が** 体調を崩す correct to say that he is ill
> because of a cold?

No, it is not correct, grammatical or natural-sounding. You can say instead:

> 「彼は風邪 **で** 体調を崩す。」

using a 「で」.
CC BY-SA 4.0
2018-07-26T17:05:37.167
60426
2018-07-26T17:05:37.167
60425
answer