在英语中，当一个人经常感冒时，我们常用 "catch colds easily" 或 "be prone to colds" 来表示。这个表达的来源可能是因为当一个人易于感冒时，他们就像是轻易地被感冒“抓住”了。

下面是一些使用这个表达的英文例句，以及它们的中文翻译：

"I seem to catch colds easily. Every time the weather changes, I get sick." (我似乎很容易感冒。每次天气变化时我都会生病。)
"I've always been prone to colds. My parents say it's because I don't dress warmly enough in the winter." (我一直很容易感冒。我父母说这是因为我冬天穿得不够保暖。)
"My coworker catches colds easily, so she always has a box of tissues on her desk." (我的同事很容易感冒，所以她的办公桌上总是有一盒纸巾。)