There is a third classification of verbs. It is made according to the mode of inflection.

215. Verbs of the New Conjugation, or Weak Verbs,1 are verbs that form their past tense and past participle by the addition of ed, d, or t.

216. Verbs of the Old Conjugation, or Strong Verbs,2 have the following peculiarities:

(1) They form their past tense by changing the vowel of the root form.

1 These verbs are sometimes called regular verbs. 2 These verbs are sometimes called irregtdar.

(2) Their past participles, if these have a suffix, end in en or n.

(3) The chief vowel of the past participle may be the same as that of the root form, or as that of the past tense, or different from either.

Correct the lists that you made in Exercise 257. A list of the strong verbs is given on pages 330-332.

Exercise 259

Find among the old conjugation verbs studied in Exercise 257 an illustration of each peculiarity mentioned in § 216.