24.2.XYZ 二态相同2: The -ought and -aught Clusters

不规则动词：二态相同 —— -ought 与 -aught 模式. 这些动词在语言学中被称为 "Germanic Weak Verbs with Ablaut" 的遗迹。它们的过去式和分词都以经典的 /ɔːt/ 音结尾，但在拼写上区分 ought 和 aught。历史来源于古英语中的“韵尾弱化 + 元音短化”。

brought

[Scenario] (to bring) The heavy rain _____ a sudden and unexpected flood to the valley.

bought

[Scenario] (to buy) The museum _____ a rare painting for its permanent collection last month.

fought

[Scenario] (to fight) The two armies _____ a long and difficult battle in the desert.

thought

[Scenario] (to think) Most people _____ the original plan was too risky to succeed.

caught

[Scenario] (to catch) The police finally _____ the thief after a long chase through the city.

taught

[Scenario] (to teach) The professor _____ linguistics at the university for over thirty years.