How do i get my 9 week old brazillian mastiff to stop biting?

he is a baby.. he wont stop.. the best thing to do is to buy some chew toys.. my dog is 1years old and still loves to bites us:P i know that your puppy has little sharp teeth and i know it hurts a lot.. but just be patient.. you could also say something like 'no' when hee tries to bite you.. with a really strict voice :)