A gang of bullies threatened to beat him up.一伙暴徒威胁说要狠狠揍他一顿。

He was beaten up badly by the bullies.他被一群流氓打得遍体鳞伤。

a politician who is getting beat/beaten up by liberal/conservative critics被自由派/保守派的批评家们批得体无完肤的政治人物

He's been beating himself up [=he has been harshly blaming or criticizing himself] because of the failure of his marriage.他因为失败的婚姻而一直非常自责。