there be 句型中be动词的形式是取决于什么？be 动词的形式指的是什么时候用is are

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there be句型中 be动词由紧接着be动词的名词悔兄决定
例：there is an apple on the table. 紧接着的是an apple 是单数 所以用is
there is some water in the cup. 因为water是不可数的 所以be 动词仍用 is.
there are some computers in the classroom. 紧坦前圆接着的是some computers是复数，所以用are
there is an apple and some oranges in the bag。虽然这里有两样物品 但是紧接着的是an apple 是单数 所以仍用is。
there are many students and a teacher in the music room. 紧接着的是many students 是复数 所让塌以用 are.

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就近原则，既紧挨着的名词吵含决定谓语升或笑的单复数形式。例如团兆：
There is a teacher and many students on the playground.
There are many students and a teacher on the playground.

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