She must be fat.(变成否定句)

She must be fat.(变成否定句) Because she doesn't want （be)fat. She doesn't want _________ (be)fat. must be的否定式怎么改 she must be hungry,___she? she who must be obeyed She used to be very fat 的肯定回答是什么? my sister is kind of fat ,and she must eat meatmy sister is kind of fat ,and she must eat ______(little) meat 为什么must be的否定式是can't be而不是mustn't be I think she must be crazy! It must be she‘s 还是 hers? children must be served fruit in the school cafeteria,along with low-fat meals翻译一下 ---Oh,I can h ___ put on my skirt.---You must be getting fat. She______(be)a very kind person,but she always______(think)she is too fat. She didn't used to be fat .= She used to be fat .此处didn't已经是过去时了,为什么used不改成use? She must be ___ when she hears the new. She must go now.(变成一般疑问句） 把She used to be very fat改成否定句　急!