Thank you very much.Mathew and Rahnesha.I got it

Hard question. Rahnesha gives a great example in my opinion. Sometimes they can all be used interchangeably, other times not. Consent is probably used more when you are giving someone a right to something personal. You give a doctor consent to operate on you, (it’s true that you also permit the doctor to operate on you, or agree that the doctor can operate on you but consent is more appropriate), the age of consent is another example, or you might give a lawyer consent to act on your behalf. So the way I look at it, if you agree, or permit to give something personal to someone else (your legal rights, your body) you consent to it. Permission is also something that you give. If you want to borrow something from me, I’ll need to give you permission, or permit you to borrow it. I can ”consent” to let you use my lawnmower, but permit is probably a better term. Agree is a much broader term. It can apply to the examples above, but I don’t necessarily have to give something up to “agree”. I usually do have to give something up If I permit or consent. For example I agree that Ranesha has given a good answer, Ive lost nothing by saying that. If I permit you to use my lawnmower, then I give you my lawnmower for a couple of hours (and I don’t have it). If I consent to an operation, I allow a surgeon to cut me open. Hope that hasn’t confused you further, also just my opinion.

Let’s use going to the hospital as an example: You agree to go to the hospital and to get check out by the doctor because you’re sick. However, The doctor tells you that you need to have surgery. So if you would like to have surgery you would give consent yo the doctor to have surgery. The difference between agree and consent is that you can agree to allow the doctor to evaluate you but you can refuse consent to have surgery. Permit is more like you’re giving access. For example, if you’re at a concert you can permit certain people to go backstage to meet the artist if they have a certain ticket that permits them to go backstage. This is my personal thoughts these are not dictionary definitions.