I have never been here.I haven't been here.
愿意：我没有来过这里.
1.I have never been here.
2.I haven't heen here.
3.I didn't come here.
是否三句都正确?我知道第一句和第二句是现在完成时,第三局是一般过去时.它们有什么区别?
再加一句
4.I have never come here.能这样用COME代替BEEN吗？