The document listing the principles by which a nation is governed
I am not sure how to explain this so i'll give you an example..
I <u>would have had</u> it done before homework
In this sentence, there are 2 words that represents past. "Would" and "Had", which makes up a past perfect.
spending all their money to buy a new one because they lost it, and they end up finding out the original was fake. they go broke