How do you get past the guy to get into three witches in hogs mead west in Harry Potter years1-4?

To get past the guy blocking the entrance to the Three Broomsticks in Hogsmeade during Harry Potter Years 1-4, you need to first complete the required tasks and quests leading up to that moment. Typically, this involves interacting with other characters and fulfilling certain objectives to progress the story. Once you've done this, you should be able to approach the entrance and enter the pub without any issues. If you're having trouble, ensure you're following the main questline closely, as that's often the key to unlocking new areas.