快速答案
conselho 是建议；aviso 是通知或警告。
可靠的方法是先判断这个词在句子里的功能，再翻译。
每个词的作用
conselho
advice
Use conselho for a recommendation about what someone should do.
aviso
notice, warning, or message
Use aviso for information that alerts, announces, or warns someone.
如何选择
- conselho: Choose conselho if the sentence points to a recommendation about what someone should do.
- aviso: Choose aviso if the sentence points to information that alerts, announces, or warns someone.
例句
Ela me deu um bom conselho.
She gave me good advice.
Recebi um aviso do banco.
I received a notice from the bank.
常见误区
English “advice” is uncountable, but Portuguese conselho is countable: um conselho, dois conselhos.
放到语境中练习
从你的真实生活中选一个句子，写两遍：一次用 conselho，一次用 aviso。如果两个版本都可以，说明意思怎样变化。