Since the Earth is orbiting the Sun at the same time the Moon is orbiting the Earth, it takes a little over two days to catch up to the same spot with respect to the Sun.
(the Earth; is orbiting; the Sun; T:at the same time) (the Moon; is orbiting; the Earth; T:the same time)
the Earth the Moon
is orbiting is orbiting
the Sun T:at the same time
the Earth T:the same time