YOU SAID:

You shouldn't look a gift horse in the mouth

INTO JAPANESE

あなたは口の中に贈り物の馬を見てはいけません

BACK INTO ENGLISH

You must not look at the gift horse in the mouth

INTO JAPANESE

あなたは口の中で贈り物の馬を見てはいけません

BACK INTO ENGLISH

You must not look at the gift horse in the mouth