Donna's mother had heard her frantic shouts, and now said soothingly: "Have you forgotten Elaine has spent the night at her friend's house?"

frantic 是形容词，意思是"疯狂的、狂乱的"，形容因极度焦虑或恐惧而失去理智的状态。 soothingly 是副词，由动词 soothe（安抚、抚慰）加后缀 -ing 和 -ly 构成，表示"以安抚的方式"。