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The preterite and past participle forms of irregular verbs follow certain patterns. These include ending in -t (e.g. build , bend , send ), stem changes (whether it is a vowel, such as in sit , win or hold , or a consonant, such as in teach and seek , that changes), or adding the [ n ] suffix to the past participle form (e.g. drive , show , rise ).
Some other irregular verbs derive from Germanic weak verbs, forming past tenses and participles with a -d or -t ending (or from originally strong verbs that have switched to the weak pattern). The weak conjugation is also the origin of the regular verbs ending in -ed ; however various historical sound changes (and sometimes spelling changes ...
(A verb with a weak preterite.) A number of English verbs form their preterites by suppletion, a result of either ablaut, a regular set of sound changes (to an interior vowel) in the conjugation of a strong verb, or because the verb conjugations are the remains of a more complex system of tenses in irregular verbs: She went to the cinema ...
The past participle of regular verbs is identical to the preterite (past tense) form, described in the previous section. For irregular verbs, see English irregular verbs. Some of these have different past tense and past participle forms (like sing–sang–sung); others have the same form for both (like make–made–made).
Excluding four common irregular verbs, the principal parts of all other English verbs are the infinitive, preterite and past participle. All forms of these English verbs can be derived from the three principal parts. Four verbs have an unpredictable 3rd person singular form and the verb "to be" is so irregular it has seven separate forms.
A verb that does not follow all of the standard conjugation patterns of the language is said to be an irregular verb. The system of all conjugated variants of a particular verb or class of verbs is called a verb paradigm; this may be presented in the form of a conjugation table.
The most unambiguously irregular verbs are often very commonly used verbs such as the copular verb be in English and its equivalents in other languages, which frequently have a variety of suppletive forms and thus follow an exceptionally unpredictable pattern of conjugation.
Regular verbs form the simple past end-ed; however there are a few hundred irregular verbs with different forms. [2] The spelling rules for forming the past simple of regular verbs are as follows: verbs ending in -e add only –d to the end (e.g. live – lived, not *liveed), verbs ending in -y change to -ied (e.g. study – studied) and verbs ending in a group of a consonant + a vowel + a ...