Is this your pencil?

Is this your pencil? this is your pencil Is this your pencil?是什么意思? Is this pencil your?改错 Is this your pencil case中文 Is this your pencil?改为陈述句+复数 This is your pencil.(改为一般疑问句) is this your pencil-box?的答语 Is this your pencil?Yes,t( )you Is this your pencil?中this是什么词? Is 【this】 your pencil-box.问为什么用this. This is my pencil ,and that is your.改病句