Is there anthing planned for tonight?请问主句话there有什么作用,完全没有字面意

there...是"这里"
整句就是~今晚这里有任何计划好的吗?
there is anything是一个固定搭配,类似的还有there is something, there is nothing
在这个后面（anything,something,nothing),你可以加一个形容词,如：planned
所以是there is anything planned
改成疑问句就是is there anything planned