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irregular verb forerun **
** This verb (in all forms) is obsolete or is used only in particular cases or dialects.
The
present perfect continuous tense (sometimes referred to as the present perfect progressive tense) is a special tense which talks about events in the past that last into the present. It usually emphasizes the duration or amount of time that the action has been taking place. The present perfect continuous uses two
auxiliary verbs in combination with a main verb.
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