Translation of "present tense" into Persian

(grammar): Present tense is the form of language used to refer to an event, transaction, or occurrence which is happening now (or at the present time), or an object that currently exists. Compare with past tense, which is the form of language used to refer to an event, transaction, or occurrence that did happen or has happened, or an object that existed, at a point in time before now; or with future tense, an event, transaction or occurrence that has not yet happened, is expected to happen in the future, or might never happen. [..]