Strong verb

Definition and stakes

G. H. Armstrong,  English Grammar and Composition for Public Schools

“ A verb that forms its past tense by changing the vowel of the present, and its perfect participle by adding n or en to the present, is a verb of the strong or old conjugation; as, fall, fell, fallen.
Note.—Verbs of the old conjugation are called strong because they form their past tense within themselves. Verbs of the new conjugation are called weak because they form their past tense by the aid of an additional syllable.
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Source: Gutenberg

G. H. Armstrong,  English Grammar and Composition for Public Schools

“ To parse a verb is to state its class, its conjugation, its voice, its mode, its tense, its person, and number, and its subject.
Model.—The boys have broken the window.
Have broken, a verb, transitive; strong conjugation (break, broke, broken) ; active voice; indicative mode; present perfect tense, third person; plural number, agreeing with its subject boys.
Model.—If they help my friend I shall be glad.
Help, a verb, transitive; weak conjugation (help, helped, helped) ; active voice; subjunctive mode; present tense; third person; plural number, agreeing with its subject they.
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Source: Gutenberg

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