Snape was very fond of Lily Potter and he loved her. They both have the same patronus, a doe.
Chat with our AI personalities
Snape was in love with Lily and so his patronus took the shape of hers.
In Harry Potter And The Deathy Hallows, Snape sends the silver doe patronus because he was in love with lily potter and that's what form hers was and how he rememebers her. Hope this helps!
A stag, the same animal his father turned into and likely the same patronus.
Lily Potter was Muggle-born.
Snape had given that flower to lilly, in book/movie 6 Prof. Slughorn talks to Harry about how he used to have a fish. One day he had come back to his office to find a lilly (because it was lilly potter who gave it to him) i a bowl of water. Whenever he touched the flower (he might not have, I dont quite remember if he touched the flower or not) it sank to the bottom then turned into a beautiful fish. When Lilly died the fish had gone as well.