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40 lines
702 B
JavaScript
40 lines
702 B
JavaScript
export const EXCEPTIONS = {
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'are': 'were',
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'eat': 'ate',
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'go': 'went',
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'have': 'had',
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'inherit': 'inherited',
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'is': 'was',
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'run': 'ran',
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'sit': 'sat',
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'visit': 'visited'
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}
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export const getPastTense = (verb, exceptions = EXCEPTIONS) => {
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if (exceptions[verb]) {
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return exceptions[verb]
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}
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if ((/e$/i).test(verb)) {
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return verb + 'd'
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}
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if ((/[aeiou]c$/i).test(verb)) {
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return verb + 'ked'
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}
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// for american english only
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if ((/el$/i).test(verb)) {
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return verb + 'ed'
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}
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if ((/[aeio][aeiou][dlmnprst]$/).test(verb)) {
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return verb + 'ed'
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}
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if ((/[aeiou][bdglmnprst]$/i).test(verb)) {
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return verb.replace(/(.+[aeiou])([bdglmnprst])/, '$1$2$2ed')
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}
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return verb + 'ed'
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} |