I agree with Tess. Here are my thoughts:- Often the two are interchangeable e.g. I know you've some work to do. (I know you have some work to do.) I know you've got some work to do. "You've" sounds a bit weak. The use of the verb "to get" just adds emphasis. On thinking about it, I think the main use is for emphasis. "I've some lovely flowers for you" would normally be expressed as "I've got some lovely flowers for you" although both are correct grammatically. Or "I have to go now" = "I've got to go now". My kids (now in their thirties?) in a restaurant say "Can I get spaghetti, please?" whereas I would always say "Could I have spaghetti, please." I think that comes from USA probably. In more formal written English, be wary of using "to get" inappropriately. "Get" can also mean "to become" and is a very useful word, you can get anxious when your dog goes missing, get cold, get hot, don't get angry etc. Phew! You made me think a lot about my own language!