Tense in grammar refers to the time of action or state indicated by a verb. It is essential for constructing sentences and conveying when an event or action takes place. There are three primary tenses in English: past, present, and future. Each primary tense is further divided into four aspects: simple, continuous (progressive), perfect, and perfect continuous. ### 1. ** Present Tense ** - **Simple Present:** Describes habitual actions, general truths, and states. - **Structure:** Subject + base form of the verb (s/es for third person singular). - **Example:** "She writes a letter." - ** Present Continuous (Progressive):** Describes ongoing actions happening now. - **Structure:** Subject + am/is/are + verb-ing. - **Example:** "She is writing a letter." - ** Present Perfect: ** Describes actions that occurred at an unspecified time or started in the past and continue to the present. - **Structure:** Subject + has/have + past participle. ...