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Regular verbs have identical past tense and past participle forms in -ed, but there are 100 or so irregular English verbs with different forms (see list). The verbs have, do and say also have irregular third-person present tense forms (has, does /dʌz/, says /sɛz/).
For an overview of dependency grammar structure in modern linguistic analysis, three example sentences are shown. The first sentence, The proposal has been intensively examined, is described as follows. The three verbs together form a chain, or verb catena (in purple), which functions as the predicate of the sentence.
The past participle is been, and the present participle and gerund is the regular being. The base form be is used regularly as an infinitive, imperative and (present) subjunctive. For archaic forms, see the next section. English has a number of modal auxiliary verbs which are defective.
The first sentence is in the past tense (were), but a present participle expresses the progressive aspect (be standing). The second sentence is in the future tense (will), but a past participle is used for the perfect aspect (have cleaned).
In English, the similarity between the active past tense form of verbs (i.e., "John kicked the ball") and the passive past tense (i.e., "the ball was kicked") can give rise to confusion concerning a special form of reduced relative clause, called the reduced object relative passive clause [5] (so called because the noun being modified is the ...
For present participle constructions with perfect aspect (e.g. having written), see § Perfect and progressive nonfinite constructions below. Present participles may come to be used as pure adjectives (see Types of participle). Examples of participles that do this frequently are interesting, exciting, and enduring.
In English, three tenses exist: present, to indicate that an action is being carried out; past, to indicate that an action has been done; future, to indicate that an action will be done, expressed with the auxiliary verb will or shall. For example: Lucy will go to school. (action, future) Barack Obama became the President of the United States ...
With the exception of the highly irregular verb be, an English verb can have up to five forms: its plain form (or bare infinitive), a third person singular present tense, a past tense (or preterite), a past participle, and the -ing form that serves as both a present participle and gerund.