Start by taking her on a leash to where you want her to go. When she goes, say a key word like "outside". With our dog whenever we say "outside" she heads to the door to do her business. Be consistent and take her out alot!
If she is doing her thing in a place you rather her not too, put her nose in it and tell her Bad. Then take it to the place she can go and make her know that is where she should do her thing. Do Not Hit, Scold or get Angry. Be Firm, Loving and Kind.After a few days she will hopefully get the point, if not Find yourself a good Dog training book, particular to the breed if possible.