Even though the charges continually change direction, the electric energy moves continuously forward, clinging to the same wire where the direction of the current is alternating back and forth.
(the electric energy moves continuously forward; clinging; to the same wire) (the direction of the current; is alternating; back and forth; L:the same wire)
the electric energy moves continuously forward the direction of the current
clinging is alternating
to the same wire
back and forth L:the same wire