that is my a pencil case 哪里错了四个部分 一个是that,一个是is 一个是my a,一个是pencil case

is,too,that,pencil,my,and) (is,case,yellow,this,a,pencil(is,too,that,pencil,my,and) (is,case,yellow,this,a,pencil)连词成句 That is my a pencil-box.改病句 Is that a pencil s___? That is my pencil.同义句转换 that,is,my,pencil,(同义句转换) that is my a pencil case 哪里错了四个部分 一个是that,一个是is 一个是my a,一个是pencil case that is a pencil.改为复数句 That is my a yellow pencil sharpener.改错怎么改啊! This is my pencil ,and that is your.改病句 I found my pencil that was my favoriteRT 还是I found my pencil that is my favorite This pencil is 18cm.That pencil is 20cmThis pencil is a ___ ____ than that one Is that a pencil?和That is a pencil?有区别吗? my pencil is ____ my pencil case That is my pencil box改为一般疑问句 is,that,not,pencil,sharpener,my连词成句 is,my,not,that,pencil连词成句 That is my pencil case（改为一般疑问句） That is my pencil sharpener?(改为一般疑问句