I forgot my house plant on my closed in sun porch without heat for two months in very cold weather. about 20 to 30 degrees. The leaves are soft and look lifeless. Can I still save my plant?

Oh dear! It's roots may well still be alive though - bring it into a warmer room and give water from the base with a 10 minute soak, then drain water off and wait to see. Cut off anything realy lifeless ....what you are hoping for is renewed growth from the roots. Hope it will work.....depends on the type of plant and its root system.

its according. do the leaves come off fast. this may be root rot from cold. are there any green leaves.

the best way to treat it if it is alive is to gradually bring it into warmer temperatures. if you grab it and put it in the warmest place you can find it might be stunned and wont grow for a while or a really WEAK plant might die.
after it is used to room temperature water so the soil is never dry.
also add plantfood
give it a sunny location and if it is still alive you will see new green leaves in a few months

also cut back some of the deader looking leaves.. the plant will try to give important energy by try to help those leaves... by taking them away the plant will give the energy to healthier leaves... dont over water it though.. cause you might cause root rot... good luck!