Britannica Sources used in this answer

How did strong verbs in Old English become regular verbs in Modern English?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Global use of the English language — English language Map showing the use of English as a first language, as an important second language, and as an official language in countries around the world.

In Old English, verbs were categorized into two primary classes: strong verbs (vocalic), which indicated tense changes through internal vowel shifts (e.g., singan, sang, sungon), and weak verbs (consonantal), which formed their past tense by adding a suffix (e.g., dēman, dēmde).1

The transition of many strong verbs into the regular (weak) pattern in Modern English is part of a broader historical trend where the language simplified its inflectional systems. Over time, the consonantal "weak" pattern—characterized by the addition of -ed, -d, or -t—became the productive, standard way to form the past tense. As the language evolved, new verbs were consistently formed using this consonantal type, and many older strong verbs gradually lost their irregular vowel-shifting patterns, adopting the regular suffix instead.12

While some strong verbs have persisted as irregular verbs in Modern English, the overwhelming tendency has been for the language to favor the regularized, predictable inflectional pattern of the weak verb class.12