-다손 치더라도

Even if we accept that something is (or was) true, the conclusion that follows still does not change.

대조·양보Contrast & concession

Han: 공부하다 is a verb, so before 손 it needs the present form 공부한다, just as in quoted speech (공부한다고); the bare dictionary form -다 is for adjectives.

Examples

설령 그 말이 사실이었다손 치더라도 그렇게까지 화를 낼 일은 아니었다.Even granting that what he said was true, it was nothing to get that angry about.

그가 실수로 그랬다손 치더라도 피해를 입은 사람들에게 사과는 해야 한다.Even granting that he did it by mistake, he still has to apologize to the people who were harmed.

아무리 바쁘다손 치더라도 부모님께 전화 한 통 드릴 시간은 있을 것이다.However busy you may be, surely you have time for one phone call to your parents.

경기가 회복된다손 치더라도 청년 실업 문제가 금방 해결되지는 않을 것이다.Even if the economy recovers, the problem of youth unemployment will not be solved right away.

-다손 치더라도vs-다고 해도The meaning is almost the same, but -다고 해도 is neutral and common in speech, while -다손 치더라도 is bookish: 바쁘다고 해도 연락은 해야지.

V+ㄴ/는다손 치더라도

A+다손 치더라도

N+(이)다손 치더라도

past: V/A/N+았/었다손 치더라도

가다 → 간다손 치더라도, 먹다 → 먹는다손 치더라도, 비싸다 → 비싸다손 치더라도, 학생 → 학생이다손 치더라도, 하다 → 했다손 치더라도

Conjugate the part before 손 like quoted speech: verbs take -ㄴ/는다, adjectives -다, nouns -(이)다. Past tense goes before 다손 (-았/었다손, 이었다손), while 치더라도 itself stays unchanged.
The second clause usually states a judgment that still stands: criticism, an obligation, or 'it still won't happen' (-아야 한다, -ㄹ 수는 없다, -지는 않을 것이다). It sounds odd with simple everyday plans or promises.
It is formal and argumentative, typical of essays, editorials and debates, and often pairs with 설령, 아무리 or 비록. In casual conversation -다고 해도 sounds more natural.

Wrong: ~~아무리 열심히 공부하다손 치더라도 한 달 만에 합격하기는 어렵다.~~

Right: 아무리 열심히 공부한다손 치더라도 한 달 만에 합격하기는 어렵다.

공부하다 is a verb, so before 손 it needs the present form 공부한다, just as in quoted speech (공부한다고); the bare dictionary form -다 is for adjectives.

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