This page provides a way for you to obtain a table of the duration of daylight or darkness for any year between 1700 and 2100. Decide on which form to use. If you want a table for cities or towns in the U.S. or its territories, use Form A below. For other locations, use Form B below.
Definition. In English grammar, the present tense is a form of the verb that is represented in English by either the third-person singular-s inflection (for example, She laughs ) or the base form (I/You/We/They laugh ). Also called the non-past. Contrast with the past tense or preterite.
Present Perfect Tense. Present perfect tense describes an action that happened at an indefinite time in the past or that began in the past and continues in the present.This tense is formed by using has / have with the past participle of the verb.ast Perfect Progressive. Past perfect progressive tense describes a past, ongoing action that was completed before some other past action. This tense is formed by using had been and the present perfect of the verb (the verb form ending in-ing).