• edit) I'm trying to apply it to my role-playing script assignment in a class that requires including idioms. I only wrote this phrase down from a random book because it seemed interesting expression and wanted to memorize it..so, sorry I couldn't give a clear sentence or situation about that. I only had an impression that it is used in a negative way. My script concept is that, pretending that I'm an athlete or musician (I don't decide about it yet), I'd like to advise a nother fellow athlete/musician who is about to participate in a match/contest with my enemy(?) in the past.

• A: Hi, how have you been?

• B: I'm great. Thank you for asking. How about you? We haven't seen each other since the after-party a few weeks ago.

• A: Nothing to complain. Hey, I've heard you are participating in the ABC contest in a week.

• B: That's right. I've been preparing for it but, from the things I heard about, one of the participants is '(name)' and you know her talent is over the top. I'm afraid I don't know much about her style.

• A: You are going to be great. Remember you were the winner of the other competition not long ago? So I know you've got a great talent as well. But fair warning, I had met her as my opponent in a similar situation and if you give her an inch, she will take a mile. Just do your best and try not to make any mistake.

• B: Thank you for the encouraging words and warning. I guess I can only try to psych myself up and practice until the contest. I'd better go then. It was good to talk with you. See you later~.

I'm trying to apply it to my role-playing script assignment in a class that requires including idioms. I only wrote this phrase down from a random book because it seemed an interesting expression and I wanted to memorize it. So, sorry I couldn't give a clear sentence or situation about that. I only had an impression that it is used in a negative way. My script concept is pretending that I'm an athlete or musician (I haven't decided yet), I'd like to advise another fellow athlete/musician who is about to participate in a match/contest with one of my past opponents.

• A: Hi, how have you been?
• B: I'm great. Thank you for asking. How about you? We haven't seen each other since the after-party a few weeks ago.
• A: Nothing to complain. Hey, I've heard you are participating in the ABC contest in a week.
• B: That's right. I've been preparing for it but, from the things I heard about, one of the participants is '(name)' and you know her talent is over the top. I'm afraid I don't know much about her style.
• A: You are going to be great. Remember you were the winner of the other competition not long ago? So I know you've got a great talent as well. But fair warning, I had met her as my opponent in a similar situation and if you give her an inch, she will take a mile. Just do your best and try not to make any mistake.
• B: Thank you for the encouraging words and warning. I guess I can only try to psych myself up and practice until the contest. I'd better go then. It was good to talk with you. See you later.

(A fictional situation) I want to give a warning to someone about something I experienced because they are in a situation I had been through. Maybe a sport competition sort? That they will lose if they make a concession..  In that case, would "if you give (someone) an inch, they will take a mile" be appropriate to use?

(If there's any other expressions for the same meaning what would it be?)

(A fictional situation) I want to give a warning to someone about something I experienced because they are in a situation I had been through. That they will lose if they make a concession..In that case, would "if you give (someone) an inch, they will take a mile" be appropriate to use?

• edit) I'm trying to apply it to my role-playing script assignment in a class that requires including idioms. I only wrote this phrase down from a random book because it seemed interesting expression and wanted to memorize it..so, sorry I couldn't give a clear sentence or situation about that. I only had an impression that it is used in a negative way. My script concept is that, pretending that I'm an athlete or musician (I don't decide about it yet), I'd like to advise a nother fellow athlete/musician who is about to participate in a match/contest with my enemy(?) in the past.

• A: Hi, how have you been?

• B: I'm great. Thank you for asking. How about you? We haven't seen each other since the after-party a few weeks ago.

• A: Nothing to complain. Hey, I've heard you are participating in the ABC contest in a week.

• B: That's right. I've been preparing for it but, from the things I heard about, one of the participants is '(name)' and you know her talent is over the top. I'm afraid I don't know much about her style.

• A: You are going to be great. Remember you were the winner of the other competition not long ago? So I know you've got a great talent as well. But fair warning, I had met her as my opponent in a similar situation and if you give her an inch, she will take a mile. Just do your best and try not to make any mistake.

• B: Thank you for the encouraging words and warning. I guess I can only try to psych myself up and practice until the contest. I'd better go then. It was good to talk with you. See you later~.