What type of sentence is A downturn in my weekly budgetary conditions prevents my attending the cinema with you this weekend?

The sentence "A downturn in my weekly budgetary conditions prevents my attending the cinema with you this weekend" is a complex sentence. It contains an independent clause ("A downturn in my weekly budgetary conditions prevents") and a dependent clause ("my attending the cinema with you this weekend"). This structure allows it to convey a complete thought while also providing additional information about the reason for not attending the cinema.