There be句型There -- a book,two pens and some rulers on the de

填is啊,there be 句型遵循就近原则嘛.
如果紧跟其后的是单数名词或不可数名词,则be动词用单数,就像你说的那个句子.
如果紧跟其后的是复数名词,则be动词用复数,如：
There are some apples and a pear on the table.