/**
 * @class Handles English verb conjugation between base, past tense, and past participle forms.
 *
 *      - Provides methods to convert verbs between base, past, and past participle forms, check verb forms, and manage custom conjugation rules.
 *      - Supports adding custom conjugation rules and irregular verbs.
 *      - Automatically handles common irregular verbs like "go" to "went" (past) and "gone" (past participle).
 *      - Automatically loads common irregular verbs and conjugation rules.
 *      - Preserves case sensitivity of input verbs.
 *      - This class is useful for natural language processing tasks, such as chatbots, text analysis, or content generation systems requiring accurate verb conjugation.
 *
 * @remarks
 * For ready to use instance, please refer to {@link https://toolbox.nazmul-nhb.dev/docs/utilities/string/verbalizer verbalizer} instead.
 *
 * @example
 * const myVerbalizer = new Verbalizer();
 * myVerbalizer.toPast('run'); // "ran"
 * myVerbalizer.toParticiple('go'); // "gone"
 * myVerbalizer.toBase('went'); // "go"
 */
export declare class Verbalizer {
    #private;
    /**
     * Initializes `Verbalizer` with default rules and irregular verbs.
     * Automatically loads irregular verbs and conjugation rules for base, past and past participle forms.
     */
    constructor();
    /**
     * * Add a new base tense conjugation rule.
     * @param rule Pattern to match past/participle form of verbs.
     * @param replacement Replacement pattern for base tense form.
     * @example
     * verbalizer.addBaseRule(/ied$/i, 'y');
     */
    addBaseRule(rule: RegExp, replacement: string): void;
    /**
     * * Add a new past tense conjugation rule.
     * @param rule Pattern to match base verbs.
     * @param replacement Replacement pattern for past tense form.
     * @example
     * verbalizer.addPastRule(/e$/i, 'ed');
     */
    addPastRule(rule: RegExp, replacement: string): void;
    /**
     * * Add a new past participle conjugation rule.
     * @param rule Pattern to match base verbs.
     * @param replacement Replacement pattern for past participle form.
     * @example
     * verbalizer.addParticipleRule(/e$/i, 'ed');
     */
    addParticipleRule(rule: RegExp, replacement: string): void;
    /**
     * * Add a custom irregular verb.
     * @param base Base form of the verb.
     * @param past Past tense form.
     * @param participle Past participle form.
     * @example
     * verbalizer.addIrregular('swim', 'swam', 'swum');
     */
    addIrregular(base: string, past: string, participle: string): void;
    /**
     * * Convert a verb to its past tense form.
     * @param verb Base form of the verb.
     * @returns Past tense form of the verb.
     * @example
     * verbalizer.toPast('walk'); // "walked"
     * verbalizer.toPast('run'); // "ran"
     */
    toPast(verb: string): string;
    /**
     * * Convert a verb to its past participle form.
     * @param verb Base form of the verb.
     * @returns Past participle form of the verb.
     * @example
     * verbalizer.toParticiple('walk'); // "walked"
     * verbalizer.toParticiple('go'); // "gone"
     */
    toParticiple(verb: string): string;
    /**
     * * Convert a verb to its base form.
     * @param verb Past or past participle form of the verb.
     * @returns Base form of the verb.
     * @example
     * verbalizer.toBase('went'); // "go"
     * verbalizer.toBase('walked'); // "walk"
     */
    toBase(verb: string): string;
    /**
     * * Check if a given verb is in its past tense form.
     * @param verb Verb to check.
     * @returns True if the verb is in past tense, otherwise false.
     * @example
     * verbalizer.isPast('ran'); // true
     * verbalizer.isPast('run'); // false
     */
    isPast(verb: string): boolean;
    /**
     * * Check if a given verb is in its past participle form.
     * @param verb Verb to check.
     * @returns True if the verb is in past participle form, otherwise false.
     * @example
     * verbalizer.isParticiple('gone'); // true
     * verbalizer.isParticiple('go'); // false
     */
    isParticiple(verb: string): boolean;
    /**
     * * Check if a given verb is in its base form.
     * @param verb Verb to check.
     * @returns True if the verb is in base form, otherwise false.
     * @example
     * verbalizer.isBase('run'); // true
     * verbalizer.isBase('ran'); // false
     */
    isBase(verb: string): boolean;
}
/**
 * Default shared instance of {@link https://toolbox.nazmul-nhb.dev/docs/classes/Verbalizer Verbalizer}.
 *
 * - Use this when you don’t need multiple configurations.
 * - It comes preloaded with standard conjugation rules and irregular verbs.
 * -
 *
 * @example
 * import { verbalizer } from 'nhb-toolbox';
 *
 * verbalizer.toPast('run'); // "ran"
 * verbalizer.toParticiple('go'); // "gone"
 * verbalizer.toBase('went'); // "go"
 */
export declare const verbalizer: Verbalizer;