1 beg (sb) for sth;beg sth (of/from sb);beg (sb) to do sth to ask sb for sth strongly, or with great emotion 恳求；乞求: He begged for forgiveness. 他恳求原谅。We begged him to lend us the money. 我们恳求他借钱给我们。 [SYN] entreat or implore 同义词为 entreat 或 implore

2 beg (for) sth (from sb) to ask people for food, money, etc because you are very poor 行乞；乞讨: There are people begging for food in the streets. 街头有人在乞讨食物。

1 I am sorry 对不起: I beg your pardon. I picked up your bag by mistake. 对不起，我误拿了你的袋子。

2 used for asking sb to repeat sth because you did not hear it properly （用于请对方把话重复一遍，以便听清楚）