" At one stage in the history of English, the past tenses of verbs were marked by a regular vowel change process; instead of “help/helped,” we had “help/holp.” Over time, -ed became the preferred way to mark the past tense, and eventually the past tense of most verbs was formed by adding -ed. But the old pattern was preserved in verbs like “eat/ate,” “give/gave,” “take/ took,” “get/got”—verbs that are used very often, and so are more entrenched as a linguistic habit (the very frequently used “was/ were” is a holdover from an even older pattern). They became irregular because the world changed around them. "

― Arika Okrent , In the Land of Invented Languages: Esperanto Rock Stars, Klingon Poets, Loglan Lovers, and the Mad Dreamers Who Tried to Build a Perfect Language