First, the basic knowledge of basketball: 1, practice physical coordination. 2, you should regard basketball as your partner, pat and touch it often, and you will feel it for a long time. Basketball is either 5v5 or 3v3. Passing the ball is very important. Second, basketball rules and referee overtime violations 1, 3 seconds rule: when a team controls the ball, the players should not stay in the opponent's restricted area for more than 3 seconds. If a foul ball is thrown during the game or after possession, as long as the player on the same side stays in the opponent's restricted area for more than 3 seconds, the referee will immediately whistle for 3 seconds. 2. Five-second rule: When the player with the ball is closely guarded and fails to pass, throw, roll or dribble within five seconds, a foul will also be declared. The ball was fouled in the past five seconds, and now the opposing team is throwing a foul ball nearby. 3. Eight-second rule: A team must push the ball to the frontcourt within eight seconds of controlling the ball in the backcourt, otherwise it will be sentenced to an eight-second violation and the opponent will throw a foul ball. 4.24-second rule: After a team controls the ball on the court, it must make a shot within 24 seconds, otherwise it will be sentenced to a 24-second violation. In the past, if the ball was thrown out of bounds within 24 seconds, 24 seconds would be recalculated. Now, after throwing an out-of-bounds ball from the sideline, 24 seconds will not be recalculated, but it must be shot within the remaining 24 seconds, otherwise it will still be judged as a 24-second violation and the opponent will throw an out-of-bounds ball. General rule: seven fouls plus one free throw. Team rule: At the middle of the game, the number of personal fouls and technical fouls of a team accumulated to seven. After that, if any player of the team commits a personal or technical foul again, he will execute the one plus one free throw rule and be sentenced to a free throw by the infringed opponent. If the free throw is successful, the player will add another free throw; If you miss the first free throw, the game should continue. If not, it's a foul, and the other side throws a foul ball on the sideline. Give them extra free throws. For example, the ball served by the penalty shooter didn't touch the basket. Technical Rule 1, Technical Foul: Technical Foul refers to excluding all players who come into contact with the opposing team. Players must not ignore the referee's advice or use improper behavior. 2. Twice dribbling: Also known as "illegal dribbling", players are not allowed to dribble again after the first dribbling. After losing control of the ball, he can only shoot and pass the ball unless it is touched by another player. 3. dribbling collision: the dribbling player pushes or moves to the body contact of the defender's trunk. When the defender has stood in advance at the moment of contact, the attacking player constitutes a ball. 4. Blocking foul: Personal foul refers to incorrect physical contact caused by unreasonable position, incorrect body posture, improper starting method and illegal actions between the ball holder and the defensive ball holder during the offensive and defensive process. 5. Killer foul: Also known as "illegal use of hands", the defender hits the killer when dribbling, layup and shooting, so that the referee will sentence him to a foul. 6. Walking: Also known as "illegal walking with the ball", it means that when a player holds the ball on the court, one foot or both feet illegally move in any direction, exceeding the limit stipulated by the rules. 7.24 seconds violation: 1. When a player controls a live ball on the court, the team must finish shooting within 24 seconds. Timer is an indispensable part of basketball game. 24 seconds is allowed when the basketball is still in the flight path after shooting. If the basketball finally touches the basket, the 24-second timer will reset the time. If the shot fails to touch the basket, it will be sentenced to 24 seconds overtime violation. 2. Control the team not to shoot for 24 seconds, and give a signal tone for 24 seconds. It is illegal to violate this rule. 8. Eight-second violation: The attacker must send the ball to the opponent's half within eight seconds. If it can't be sent to the opponent's frontcourt eight seconds ago, the referee will judge the opponent to serve and the game will start again. 9,5 seconds violation: 1. The attacking player must throw the foul ball within 5 seconds; 2. When being personally defended, you must pass, throw or dribble within 5 seconds; 3. When making a free throw, the penalty taker must throw the ball within 5 seconds. 10, Foul by both sides: Foul by both sides means that two opposing players commit personal fouls with each other at about the same time. If both sides commit a foul, each player who commits a foul will remember the individual foul, not the penalty, and only the player's foul, not the whole team.