loud aloud loudly sound的区别（用句子说明）

loud 1、adj.(-er, -est) 喧闹的; 响亮的: loud voices, screams, laughs, etc 宏亮的嗓音、 喊声、 笑声等 * That music's too loud; please turn it down. 那音乐太吵人了; 请把音量调低些.
2、adv.(-er, -est) 尤与talk、 sing、 laugh等动词连用: laugh loud and long 大笑不已 * Speak louder I can't hear you. 大点声说--我听不见.

aloud
adv.出声地（用足以使人听得到的声音, 既非默不作声地亦非悄悄声地）: He read his sister's letter aloud. 他喃喃地读他妹妹的信.
大声地, 高声地（使得在远处也听得见）: She called aloud for help. 她高声呼救

loudly
adv.高声地；响亮地She screamed as loudly as she could.

sound n.1、[U] 声; 声音: Sound travels more slowly than light. 声速低於光速.
2、[C, U] 声音; 声响: * I heard a strange sound outside. 我听到外面有一种奇怪的声音. * He crept upstairs without a sound, ie noiselessly. 他悄悄地上了楼.

LOUD是形容词,ALOUD是副词,LOUDLY是副词,SOUND是名词

THE SOUND IS LOUD,说SOUND声音大
ALOUD,HE SPEAKS ALOUD他说话大声
和HE SPEAKS LOUDLY是一个意思
SOUND就是声音的名词了,THE SPEAD OF SOUND,声音的速度

aloud， loud ，loudly 均可做副词。

aloud 出声地 大声地 多与read 、speak连用 例