YOU SAID:

Give them an inch and they’ll take a mile.

INTO JAPANESE

彼らに1インチ与えると彼らは1マイルかかるでしょう。

BACK INTO ENGLISH

If you give them an inch, they will take a mile.

INTO JAPANESE

あなたが彼らに1インチを与えるならば、彼らは1マイルかかるでしょう。

BACK INTO ENGLISH

If you give them an inch, they will take a mile.