为什么This is paper中间不用加a,也就是为什么不说This is a paper

为什么This is paper中间不用加a,也就是为什么不说This is a paper There are little paper here,please bring some.这里用are对吗,为什么不用is呢? this paper is smooth to the touch 翻译一下句子,这里为什么用介词to? is this your pen? 为什么答案上面是 yes this is 怎么不用yes it is ... this is an apple中为什么要用不定冠词不用可不可以,能不能写成This is apple this table is of glass 为什么可以省略 made 为什么不用 thisthis table is of glass 为什么可以省略 made 为什么不用 this table is made of glass The book made ——this kind of paper is not popular为什么填of不填from呢? Mom,_____ my English teacher A：this is B:she is为什么用this is而不用she is The kite is made of paper．风筝是用纸做的.为什么不用过去式（was）而用is?The CD is made in China呢? what does this word mean为什么不用what is this word meaning THIS IS NO GOOD TALKING WITHOUT DOING ANYTHING为什么用THIS 不用IT This is her an eraser.与This is her eraser.This is her an eraser.与This is her eraser.为什么不用“an”? after cove is opened or unit overheats this paper to align paper,unless paper jams,帮翻译,谢谢after cove is opened or unit overheats this paper to align paper,unless paper jams,帮忙翻译一下,谢谢 This paper is full of mistakes.变成反意疑问句 this sentence in your paper is wrong,please c---- it you are a good girl中间为什么用are 而不用is? Here is your desk 的意思是这是你的桌子 为什么不用This is your desk Is this your brother?Yes,it is.请问这句中为什么用it,而不用he?