Can I record on my tunerless DVD recorder if my tv has a built-in tuner?

I recently purchased a DVD recorder which I just found out is tunerless. I don't have cable or satellite, and I'm hoping that buying an external tuner isn't my only option (aside from returning the recorder and buying a more expensive model). The tv I bought to go with the recorder DOES have a tuner. Is that good enough? Will it work in conjunction with the recorder? Or do I still need an external tuner in order to record shows from the tv? Thanks!