I think the name of the struture of this sentence is.
Future perfect.
Could you open the window, please?
Is this correct?
No, that is not the future perfect. That would be will have +verb
Could when used in the present is in the subjunctive... It indicates the possibility that something "can " happen.
Here are some sites on subjunctive usage:
http://www.bartleby.com/64/C001/061.html
http://en.wikipedia.org/wiki/English_grammar#Subjunctive_mood
hey ummmmm you see i don't know what a metaphor is and when i checked on the internet i dident get it so please help me
No, the name of the structure of the sentence "Could you open the window, please?" is not future perfect. Future perfect is a type of verb tense used to describe an action that will be completed before a specific point in the future.
The sentence "Could you open the window, please?" is in the form of a polite request, using the modal verb "could" to ask someone to perform an action. The structure of the sentence can be categorized as an interrogative (question) sentence in the present tense. Specifically, it is a polite question in the present tense, asking someone to open the window.