aloud :ad.出声地,大声地
loud :adv.&adj.大声地(的),响亮地(的),吵闹地(的)
loudly :ad.大声地,高声地
The teacher's voice is very (loud ).We all can hear it.
该用形容词,所以只有loud合适.
He read the poem (aloud).出声地
ex:Please read the story aloud.
They are arguing so (loudly)that I can't focus my mind on study.
带有吵闹的意思,所以用loudly
ex:The children were shouting loudly.