精选优质文档-倾情为你奉上陈述句含义：用于陈述事实和观点的句子。陈述句包括肯定结构和否定结构。This is a desk.（肯定结构）He can sing and dance.（肯定结构）He doesnt have a computer.（否定结构）There arent any pictures.（否定结构）肯定句变否定句：1. be动词的否定式be:am ,is ,are,was were构成否定式时，一律在后面加否定词notHe is reading. He is not reading.They are from China. They are not from China.2. 情态动词的否定式情态动词：can, could, must , may, might, will, would，shall,should , need,构成否定式时，一律在情态动词后面加否定词notI can swim. I can not swim.You should arrive here on ti
