Mid-Autumn Day is a traditional festival in China. Almost everyone likes to eat mooncakes on that day. Most families have a dinner together to celebrate the festival. A saying goes, "the moon in your hometown is almost always the brightest and roundest". Many people who live far away from homes want to go back to have a family reunion. How happy it is to enjoy the moon cakes while watching the full moon with your family members.
一般来说：somebody（主）+need+to do，some-thing（主）+need+doing。这时doing也可用to be done代替。那么也就告诉我们，something作主语时，和need后面的动词通常构成了被动关系。例：The trees need washing/to be washed,从这引申出：如果主语是somebody，但和need后面的动词也构成被动关系，那么也应该用to be done。试看：The sick man will need to be sent to a hospital。