It is too late to catch the bus.这句话中,to catch the bus 做什么成分?是it的补语吗?

It is too late to catch the bus.这句话中,to catch the bus 做什么成分?是it的补语吗?
It is too late to catch the bus.
这句话中,to catch the bus 做什么成分?是it的补语吗?

It is too late to catch the bus.这句话中,to catch the bus 做什么成分?是it的补语吗?
too ...to...太.而不能.是固定的用法,to catch the bus动词不定式是主语,it 是形式主语,代to catch the bus