When you are trying to identify the verb in a sentence, you are looking for the action. Who did what? In this sentence, the subject is "one of Rodrigo's roommates." What did he do? He "may have forgotten" something. The phrase "to pay the rent" identifies what he "may have forgotten" to do. Thus, the verb phrase in this sentence is "may have forgotten."
This passage is more about government and injurys
I wish if I can , I want to help
A complex sentence consists of an independent clause and at least one dependent clause.
Patricia plans to attend a bible seminary -- independent clause
after she graduates -- dependent clause
so it is a complex sentence
No, this is not a run-on sentence
