The tenancy continues as a statutory tenancy under the same terms and conditions of the original lease. The landlord is not obliged to sign another fixed term agreement after the initial agreement expires nor is the tenant.

However, if both you and the tenant want to sign another lease, you must use the Ontario Residential Tenancy Agreement (Standard Form of Lease), which can be found at http://www.mah.gov.on.ca/Page18704.asp