2. Some verbs in -nd and -ld form their past tense by changing this d to t.

Examples:

3. A few verbs add d or t in the past and also change the vowel of the present. Thus,—

sellsold
telltold
shoeshod
saysaid (pronounced sed)
hearheard (pronounced herd)
bringbrought
buybought
catchcaught
seeksought
beseechbesought
teachtaught
methinksmethought

Work has an old past tense wrought, common in poetry; its usual past is worked. For must, would, etc., see [p. 299].

4. Some verbs that have a long vowel sound in the present have in the past a short vowel sound before the ending t.

Examples:

5. Some verbs in d or t preceded by a long vowel sound have a short vowel in the past but add no ending.