visa extensions

Hello,

My partner has moved here for a job and has a working visa. I currently just have a 60 day tourist visa expiring on Aug 17. I am wondering if anyone knows if it is possible to get a longer tourist visa when I apply for the extension? Or just the 30 or 60 days? Will I just have to keep applying for the short tourist visas the entire duration that we are here (at least 2 years) or will they stop allowing me extensions after a certain time period? Any help or advice would be MUCH appreciated.

Thank you!