all that's left to do is run这句话如果说to do是后置定语,那么all left to d

hello ,
all that's left to do is run,是的,that's left 和to do 做后置定语修饰all ,意为：剩下还要做的就是跑步了.run 有名词词性,to do 做后置定语有表将来的意思,意思就是跑步这件事还没有做.
两个后置定语的情况多见,比如 The girl in red sitting on the beach is his sister.这里,in red 和 sitting on the beach 都是做后置定语,修饰the girl 的.
I hope it can help you a lot!