Share, participate, partake can mean to have, get, use, exercise, experience, or engage in something in common with another or others.
Share implies that one as the original owner or holder grants the part use, enjoyment, or possession to another or that one as the receiver accepts the part use, enjoyment, or possession of something that belongs to or comes from another.
But share may also take for its subject a group and imply a community of possession or use.
Participate implies that one has or takes a part or a share in a thing (as a work, an experience, or an enterprise).
Partake implies that one accepts, takes, or acquires a portion of a thing (as food, drink, a pleasure, or a burden) or comes to have some of the essential or distinguishing characters of a thing.