I am now thinner than before it,is really good,yeah!有没有语法不正确

I am now thinner than before it,is really good,yeah!有没有语法不正确 My diet is _____.I am thinner than before.A.good enough B.en thinner shorter you and i than am is who than taller you 为什么 Now i am working much hard than before?这儿为什么用hard ,后面有th I am thinner than you ,and shorter.意思相同的句子有那些? I am sorry it really need a good courage I am thinner than my sister .改为疑问句 I am thinner than you.变一般疑问句.怎么变?Am I thinner than you?我觉得不对 Lucy is thinner than... I am really good cry it is a really good programme.it is even ( )than friends. I'm heavier than before.有没有语法问题?如果是对的,那这句话换种方式怎么说?