以下所有英文句子看一下哪些语法有错或者单词有错?
问题描述：
以下所有英文句子看一下哪些语法有错或者单词有错?
Cat is on the desk,Cat is not on the desk ,Book is in the bag,Book is not in the bag,Cat is so big,Cat is not so big,These are many pen,These are not many pen
答
A cat is on the desk.(The cat is on the desk.)
The cat is not on the desk.
The book is in the bag.
The book is not in the bag.
The cat is so big.
The cat is not so big.
These are many pens.
These are not many pens.