1.aloud, loud, loudly
三者均为副词，意思相当，用法上稍有区别。Aloud只表示出声，在表示大声之意时，常与call，cry，shout等表示叫喊或sob，weep等表示哭泣的动词连用：He could hardly restraint himself from shouting aloud. 他简直克制不住要大喊。loud常常用于talk，speak，laugh，sing等动词之后，有比较级：Speak louder please.请大声点。Our teacher is rather deaf，so we have to read very loud in our class.我们的老师耳朵有点背，所以在课堂上我们不得不读得很响。loudly常与loud通用：Dont talk so loudly/loud. 不要大声喧哗。但loudly 有喧闹之意，因而可以与其他表声响的词连用：The bomb exploded loudly. 炸弹轰的一声爆炸了。另外，loudly可以放在动词之前：He loudly complained about the food. 他大声抱怨食物差。
2.already，all ready already
是副词，意为较早的（earlier），提前（previously）：When she arrived，her friend had already left. 当她到达时，她的朋友应经离去了。 We discovered that the tickets were already sold. 我们发现票已经卖完了。all ready 用作形容词，意为完全好了（completely ready）。试比较：
（1）The meal is already on the table.
（2）The meal is all ready on the table.
句（1）意为饭菜已经摆在桌子上了。句（2）意为桌子上饭菜全上齐待用了。all ready还有准备好了的意思：We are all ready to start.我们做好了出发前的一切准备。