pencil sharpener为什么去掉pencil意思没变?

pencil sharpener为什么去掉pencil意思没变? I have a pencil sharpener 怎样变否定句为什么这样变详细说明 pencil-sharpener怎么读? pencil sharpener是什么意思? this is your pencil sharpener.变复数________your___________ Look! ____ a pencil sharpener 组词成句；that whose sharpener pencil ____(she)pencil sharpener is in the pencil case. is,sharpener,the,what,English,pencil,for(?) here is your pencil sharpener.( ) ( ),jane. That's a pencil sharpener in English.对a pencil sharpener 提问. this is a pencil sharpener in english 对 pencil sharpener提问