Points in doubles in badminton?

Question

I have to play doubles in badminton in a school competition and i don't get it at all!! please help!

Answer 1

Since August 2006, the new scoring system is adopted.
A point shall be added to a player's score whenever he wins a rally.
A match consists of the best of three games; a game is won by the first player to score 21 points, except if the score reaches 20 points each; in this case, play shall continue until one player either achieves a two point lead (such as 24-22), or his score reaches 30 (the score shall not extend beyond 30: 30-29 is a winning score).

In singles, the server shall stand in his right service court when his score is even, and in his left service court when his score is odd; his opponent shall stand in the diagonally opposite service court.

In doubles, the players shall remember their service positions from the previous rally; the receivers shall remain in the same service courts. When a receiving pair wins a point and thereby regains the service, they shall not change their service court positions. If their new score is even, then the player in the right service court shall serve; if their new score is odd, then the player in the left service court shall serve. Thereafter, if they continue to win points, the server shall alternate between the service courts, so that he serves to each receiver in turn.
Each team no longer has second server. Now the score determines which side the server should be (right or left).
Good luck and have fun.