Yes, if you like, but snowdrops and anemone blanda grow in shade. Daffodils prefer sun, but I know of a deciduous wood in northern France which is full of daffodils, followed by bluebells - so, perhaps there isn't too much shade before the leaves grow. Bluebells should be OK in shade because the leaves are starting to grow as they come out. Crocus need the sun to open out properly. Is the shade border because of trees or walls or?? Conifers are difficult to grow things under because they really dry out the soil with their fine surface roots.