Regulation as in what the professionals play is 90 minutes with 45 minute half's. However, if you are referring to youth soccer it depends on the age group but the half's also include a water break.
Because the clock never stops during the game (except at halftime), the referee can add time at the end of each half to make up for time that was lost due to injuries, especially long stoppages, players wasting time, etc.
Because 91 minutes would just be silly and unnecessary.
Yes, they can. The referee will stop the clock at various times resulting in more time than the proscribed 45 minutes per half.
Two 45 min halves = 90 mins
90 minutes with two 45 minute halves.
90 Minutes in a football match
90 minutes played in a football match
90 minutes long
90 minutes in english football
Each match in a football match will last for 90 minutes, but the referee will add extra time for injuries, cards and changing of players.
The match lasts 90 minutes but with extra time of 30 minutes, the entire match will last 120 minutes.
the entire game lasts about 90 minutes
Two halves of 45 minutes, so 90 minutes, plus injury time at the end of each half.
The players are human they will get tired after 90 minutes or 120 minutes, they will then make mistakes.