Read the story book in class改为否定句 keep,in the library,quiet,

Please Keep quiet in the library
再问： Read the story book in class改为否定句
再答： Don't read the story book in class.
再问： can't read the story book in class。
再答： 不对。在公共场合都应该用Don't 来表示强制性。 如：smoke in the class.否定：Don't smoke in the class,或者No smoking.来表示禁止。。