strong and weak verb

STRONG VERB

Strong verbs are the very common verbs like be, go, run and take, to name a few, that do not form the past tense by adding -ed to the stem. Instead, strong verbs change at least the vowel and sometimes the entire stem: was/were for be; went for go; ran for run; took for take; begin for start; build for make.

The key feature of a strong verb is (usually) that the simple past tense and the past participle do not end in -ed (or -t used in place of -ed). Often the stem vowel changes, too.

Examples of strong verbs
sing - sang - sung
break - broke - broken
run - ran - run
hit - hit - hit
bite - bit - bitten
grow - grew - grown
come - came - come
write - wrote - written
arise-arose-arisen
beget-begot-begotten

:)

WEAK VERB

Those weak verbs which add -d or -ed to form the past tense and past participle, and have no change of vowel, are so easily recognized as to need no special treatment. Some of them are already given as secondary forms of the strong verbs.

But the rest, which may be called irregular weak verbs, need some attention and explanation.

The two classes of irregular weak verbs.

(1) Those which retain the -d or -t in the past tense, with some change of form for the past tense and past participle.

(2) Those which end in -d or -t, and have lost the ending which formerly was added to this.

The old ending to verbs of Class II. was -de or -te; as,—

Irregular Weak Verbs.—Class I

present tense

buy

past tense

bought

past participle

bought

Irregular Weak Verbs.—Class II.

present tense

feel

past tense

felt

past participle

felt