be等等的动词该怎么用?There be /There was /are/is 形式↑有什么区别?

be等等的动词该怎么用?There be /There was /are/is 形式↑有什么区别?

使用There be句型时应注意:1)There be句型中的be 有各种时态.2)动词be单复数形式要跟there be之后的主语保持一致.并且要根据就近一致原则来变换be 的单复数形式.例如:There is a book on the desk.课桌上有一本书.3)there be引到的句子结构中,用来修饰主语的不定式用主动形式和被动形式均可.例如:There is no time to lose (= to be lost).时间紧迫.4)There be句型的否定句和一般疑问句.记住下面的口诀:There be句型有特点,主语放在be后边.变否定,很简单,be后要把not添.变疑问,也不难,把be提到there之前；肯定句中有some,否定/疑问把any换.例如:(1).There is a book on the desk.(变否定句) →There is not / isn't a book on the desk.(2).There are some chairs in the room.(变否定句) →There are not / aren't any chairs in the room.(3).There are some boys over there.(变一般疑问句) →Are there any boys over there?5)There be句型和have/has的区别:There be 表示某物存在于某个地方,have/has表示某人拥有某一样东西.4)There be句型或There加其他动词的句型,其动词的单复数,常采用就近一致的原则.

这个解释是对的