1.you are better than him.
你比他棒
you are the best.
你是最棒的
2.this is more expensive than that one.
这个比那个贵
this is the most expensive thing i have ever bought.
这个是我买过的最贵的东西
3.you can be more beautifull.
你可以更漂亮
you are the most beautifull girl.
你是最漂亮的女孩
4.you are stronger than him.
你比他强壮
your the strongest person in the world.
你是世界上最强壮的人
5.you can more clever than your father.
你可以比你爸爸更聪明一些
you are the most clever student in your class.
你是班里面最聪明的学生