YOU SAID:

I'm sorry, we had to put him down

INTO JAPANESE

すみません、私たちは彼を倒せなければなりませんでした

BACK INTO ENGLISH

I'm sorry, we had to beat him

INTO JAPANESE

すみません、私たちは彼を打ち負かしなければなりませんでした

BACK INTO ENGLISH

I'm sorry, we had to defeat him

INTO JAPANESE

すみません、私たちは彼に負けなければなりませんでした

BACK INTO ENGLISH

I'm sorry, we had to lose to him

INTO JAPANESE

すみません、私たちは彼に負けなければなりませんでした

BACK INTO ENGLISH

I'm sorry, we had to lose to him