You could be better and you have to be better.这个句子对么?

You could be better and you have to be better.这个句子对么? Just be yourself and you will be better and better you will be ( ) better. everything will be better,and you will tomorrow will be better believe .And you? Really want to love you and wanted to be with you better to it could be better. Nothing could be better. You will be better than you can be better .一段 If you want to be thinner and healthier,you'd better eat ___ you'd better后面是加原形吗,为什么i think it would be better to have.急,