plaguy

grammar · medium

易错句子The village was plaguy by a terrible disease.

正确表达The village was plagued by a terrible disease.

plaguy 是副词（意为“讨厌地、烦人地”），不能放在 be 动词后与 by 搭配表示“受到……困扰”。表示“被……折磨/困扰”要用动词 plague 的过去分词 plagued，构成 be plagued by 的被动结构。

grammar · medium

易错句子Doctors worked hard to stop the plaguy from spreading.

正确表达Doctors worked hard to stop the plague from spreading.

plaguy 只作副词（另有形容词用法），不能作名词充当 stop 的宾语；表示“瘟疫”这一疾病的名词是 plague，这里需要名词才能与定冠词 the 连用。