loud的副词形式是loudly.
loudly：adv.大声地;响亮地。
扩展资料
She went straight up to the door and knocked loudly.
她径直走到门前大声敲门。
I knocked loudly in the vain hope that someone might answer.
我敲门敲得很响，希望有人应声，却是徒然。
He shouted so loudly that the whole neighbourhood could hear him.
他叫得那么大声，整条街的人都能听到。
She screamed as loudly as she could.
她声嘶力竭地尖叫着。
He wiped his hand across his mouth, then belched loudly.
他用手抹了抹嘴，然后打了个响亮的饱嗝。
