快速答案
pegar 表示抓住的动作，segurar 表示继续握住或扶住。
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
pegar
to take, pick up, or catch
Use pegar for getting hold of something, collecting it, or catching transport.
segurar
to hold or keep steady
Use segurar for continuing to hold something or preventing it from moving.
如何选择
- pegar: Choose pegar if the sentence points to getting hold of something, collecting it, or catching transport.
- segurar: Choose segurar if the sentence points to continuing to hold something or preventing it from moving.
例句
Vou pegar o ônibus.
I am going to catch the bus.
Segure minha bolsa, por favor.
Hold my bag, please.
常见误区
For transport, use pegar: pegar o ônibus. Segurar o ônibus would mean physically holding or delaying it.
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 pegar，一次用 segurar。如果两个版本都可以，说明意思怎样变化。