Minimally coupled single field slow-roll inflation produces unobservable primordial non-Gaussianities. In this talk, we study various ways large non-Gaussianities can be generated in single field models, and characterize their profiles in terms of their shape and running. The bispectrum ansatz for each category are given so that they can be applied to the CMB data analyses. We discuss how we may be able to learn the fundamental physics from these non-Gaussianities.