The Moon orbits the Earth every 27.5 days, but because the Earth is moving, it takes 29.5 days for the Moon to catch up.
(The Moon; orbits; the Earth; T:every 27.5 days) (the Earth; is moving; ) (the Moon; to catch up; )
The Moon the Earth the Moon
orbits is moving to catch up
the Earth T:every 27.5 days