“桌上有牛奶和果酱”、“桌上有一支笔和四个本”、桌上有四个本和一支笔都怎么翻译？

there be句型 是就近原则
there is milk and jam on the table.
there is a pencil and four notebooks on the desk.
there are four notebooks and a pencil on the desk.

是就近原则

如果后面都不可数,那么还是单数形式.

比如:

There is both water and fire in there.