Is that girl here your classmate?这句话有什么问题?

Is that girl here your classmate?这句话有什么问题? My classmate is that girl( ) ( )( ) ( )glasses. Is Mary your classmate?---Yes,she is.这句话对吗?为什么, here is your ticket.here are your ticket.这两个句子有什么区别? Helen,is that your classmate ruler?哪里错了 Here is your trouser Put them on 这句话有什么错的请帮忙该了 Do you know who is the fattest girl in your class?这句话有无错? I hear the tall girl wearing glasses is your new classmate.分 I hear the tall girl wearing glasses is your new classmate.S do i am your classmate?这句话有错吗 is that girl your friend?改为复数 here is you umbrella and your coat.这句话其中your不加行不行?加不去有什么用,不加