快速答案
assegurar 常保护某种状态或作出保证；garantir 更直接地为结果或承诺负责。
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
assegurar
to assure or secure
Use assegurar for stating something confidently or taking measures to protect a condition or right.
garantir
to guarantee or ensure
Use garantir for taking responsibility for an outcome, performance, or promise.
如何选择
- assegurar: Choose assegurar if the sentence points to stating something confidently or taking measures to protect a condition or right.
- garantir: Choose garantir if the sentence points to taking responsibility for an outcome, performance, or promise.
例句
A lei assegura o acesso à informação.
The law ensures access to information.
O fabricante garante o produto por dois anos.
The manufacturer guarantees the product for two years.
常见误区
The verbs overlap heavily in “ensure” contexts. Contractual warranty language strongly favors garantir and garantia.
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 assegurar，一次用 garantir。如果两个版本都可以，说明意思怎样变化。