英文諺語 Give someone an inch and he’ll take a yard
Give someone an inch and he’ll (she’ll) take a yard 小人得寸便進尺
Be generous to someone and the person will demand even more. (Describes someone who will take advantage of you if you are even a little kind to him or her).
“I’m always wary about making concessions with these people. Give them an inch and they’ll take a mile.”
“If you let Mark borrow your tools for this weekend, he’ll wind up keeping them for years. Give an inch and he’ll take a mile. ”