I need to break my rental lease due to economical hardship, what could the landlord do to me?

Real Estate Rental
What is the legal status of the terms and conditions in a rental lease Agreement when the Agreement expires by its terms and the parties continue to abide by the terms of the expired lease? Can the parties be held legally responsible for lease conditions such as amount of rent, termination of rental time, security deposits, etc.
The lease make no references that would address these types of situations.
Thanks for your help!

Home Rental Leases
If someone signed a one year lease for a townhome and in less than 7 days changed their mind can they get out of the lease without paying the entire one year committment?

Apt rental lease
If an occupant signs the lease is he/she just as responsible for the terms in the lease as the leasee?