frighten sb to death 把某人吓得要死
frighten sb into submission [telling the secret] 使某人在恐吓之下屈服[吐露秘密]
frighten sb out of a place [drinking] 吓得某人衹好离开某处[不再酗酒]
be frightened at 受…惊吓,看见…大吃一惊
be frightened of 害怕,对…感到惊恐.