![]() ![]() ![]() Note the base form of the verb is in the following sentences. (Modal verbs themselves have no base form, infinitive, present participle, or past participle they have only present and past forms.) (1) It follows certain helping verbs, the most important being the modal auxiliary verbs or modals for short: can/could, may/might, will/would, shall/should, and must. The base form is used as a verb in three ways. The base form is also the source (or base) for the present (with a few exceptions), infinitive, and the present participle of the verb, whether the verb is regular or irregular. For example, if you looked up sang, the dictionary would refer you to the base form sing. The base form of a verb is its form in a dictionary entry. These forms are illustrated in the following chart by the regular verb walk and the irregular verb fly. Six basic verb forms are used to create the entire tense system of English: base form, present, past, infinitive, present participle, and past participle. The infinitive, however, must be in its base form, that is, used without the to that normally accompanies an infinitive. For instance, the verb help, when it means “assist, support,” may use two complements together: an object and an infinitive. ![]()
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