When the sun and moon are on opposite sides of the earth, the moon appears full to us, a bright, round disk.
(the sun and moon; are; on opposite sides of the earth) (the moon; appears; full to us; T:When the sun and moon are on opposite sides of the earth)
the sun and moon the moon
are appears
on opposite sides of the earth
full to us T:When the sun and moon are on opposite sides of the earth