Can the guard of the football attack team catch the ball please briefly introduce the rules of football

Please briefly introduce the rules of football
The history of rugby Rugby originated from football and rugby. The first football match between McGill University and Harvard University adopted the rules of rugbyIn football, only 4-point guards and running forwards can catch the ball
After the kick-off line, the quarterback can pass the ball to legal receivers other than lineman (outfielder, running guard, full position, near forward). After passing the kick-off line, he can only pass back. However, due to the tight defense system, there are few cases of backward passingWhy does American football rarely pass back or cross or continuous
In American football, only quarterbacks, running forwards, outfielders and near forwards have the right to receive the ball, while players in other positions (mainly players on the offensive front) cannot receive the ball. So as you said, there are back passes and cross passes, but the number may be a little less than that of forward passesAsk for more complete football rules
However, an English football game takes 80 minutes, and there are only two halves, with a 10 minute break between halves. Number of players: in 1880, the American Football Association stipulated that there were 11 players from each side, including 4 defenders, 7 forwards, and 3 substitutes "in case of accidents"Who knows that only four point guards and running forwards can catch the ball in football
QB (quarterback) quarterback, you must know this, hehe. Lb (Lineback) lineguard, DB (defensive back) guard, CB (cornerback) corner guard, FS (free safety) free guard, SS (strong safety) strong safety guard. I'll gradually understand it by watching more games at ordinary timesWhat are the ways of football attack
Another way to attack is to pass. Usually the quarterback passes the ball. Of course, sometimes other players pass the ball to confuse the other side. In fact, any player on the attacking side can pass the ball, as long as the ball is passed from the starting line. When the ball is caught by another offensive player, it is called a successful passFootball player position
A qualified football player requires six basic skills: run, pass, catch, block, intercept, and kick. Players from both sides will use at least two skills in each attack and defenseWhat are the rules of football
Team members. Each team consists of three types of players: the attack group, which is responsible for the attack; Defense team, responsible for defense; The special group is responsible for special situations - kick outs, shots and kickouts. In any case, one side can only have 11 players on the court. The clothes of American football players are as colorful as the playing field. Kick offWhat are the positions in American football
Maintenance of passing and receiving: in the maintenance of passing and receiving, the attack guard usually produces an arc-shaped "bag" around the quarterback to maintain the quarterback. Each defender football player has its own overall goal of blockingWhat position is there in football? What is the responsibility
The edge guard needs to have the same comprehensive skills as the last guard, but the offensive ability of the edge guard needs to be stronger than the defensive ability. Similarly, many full backs can also serve as full backs. There is a common tactic in football, that is, the wing back cuts to the middle after receiving the ball