Football yellow flag punishment to be very accurate

Football rules (tried in the United States)
I also want to know the price of football. It must be a regular game football. It must be very accurate. Thank you. When there is a violation of the rules or disturbance of the fair order of the game, the referee will throw a small yellow flag near the place of the foulAll rules of American football game
Rules: American football matches are played between two teams with a maximum of 53 players (NFL rules). Both sides send 11 players to play, and some or all of the players on the field can be changed at any time. The one who gets the ball control is the attacker, and the goal is to push the ball to the opponent's position as much as possibleWhy do NFL football referees throw a yellow towel on the ground every time they judge_ Hundred
If the offensive or defensive side commits a foul, the referee will throw a yellow flag (indicating that there is a foul in this Lun's play). The referee will point out which team and what type of foul to the data station and make a penaltyHow to understand the offside rule in American football
The black line is added by live real-time computer special effects, which is the kick-off line. If the defender of the white shirt on the left exceeds this line, the attacker will drive the ball out before he returns to the line (as long as he leaves the ground), and the defender will be sentenced to an offside foul. Offside will not be punished immediately, and the referee will throw a yellow flagThe rules of American football
American football is played between two teams with a maximum of 53 players (NFL rules), with 11 players from each side. When there is a violation of the rules or disturbance of the fair order of the game, the referee will throw a small yellow flag near the place of the foul. Punish the quarterback, back 5 yardsAsk for the rules of American professional football
American football is played between two teams with a maximum of 53 players (NFL rules), with 11 players from each side. The game clock is suspended in the following cases: passing failure, players out of bounds with the ball, and the referee whistles to punish foulsThe foul system in football, please, 3Q
Both parties shall not pull the other party's mask, the defender shall not pull the attacker's arm, and shall not move in advance before the attacker kicks off (that is, the one who throws the ball out from the block). The above are the most common fouls. Generally, you will get 5-10 yards forward or backward. If it is serious, you will be fined 15 yards for rugbyThe rules of American football
The goal of American football is to push football into the opponent's touchdown area. At the same time, he achieved more points than his opponent within the specified time of the gameThe rules of American football
The basic rules of American football in ball games, the rules of American football are more complex. But that doesn't mean you have to read an obscure rulebook to read football. In fact, it only takes you five minutes to understand the football game. Of course, if you want to understand it in depth, it is another matterWhat are the rules of football
Offensive formation the offensive method of American football is similar to that of six person football. The team holding the ball (the attacking side) has four attacks. When a foul occurs in the game, the referee will throw a small yellow flag near the place of the foul. After the game stopped, there was no foul. (usually occurs when the attacker successfully advanced more than 15 yards in the last confrontation, exceeding the number of yards punished). It can also be controlled by