seriously frightened 此句中frightened应为adj.
frightened seriously 此句中frightened应为v.
但词性判定都要由在句子中担任的成分来确定~
seriously 英音:['siriəsli] 美音:['sɪrɪəslɪ]
副词 ad.
1.严肃地
2.认真地;当真地
They take their responsibilities seriously.
他们认真对待自己的职责.
3.严重地
She was seriously injured.
她受重伤.
FYI~~~