English verb tenses allow speakers to indicate when an action takes place and whether it is ongoing, completed, or habitual. The simple tenses (present, past, future) form the foundation, while the continuous tenses emphasize actions in progress at a specific moment. For example, the present continuous uses "am/is/are + verb-ing" to describe actions happening right now, as in "She is studying," while the past continuous uses "was/were + verb-ing" for an ongoing past action, as in "I was reading when she called."
The perfect tenses show how actions relate to other points in time. The present perfect ("have/has + past participle") connects a past action to the present, such as "I have visited Paris," indicating lifetime experience. The past perfect ("had + past participle") places an action before another past event, as in "By the time she arrived, I had finished dinner." The future perfect ("will have + past participle") projects forward to a moment when something will already be complete, like "By next year, I will have graduated."
Continuous forms of perfect tenses emphasize duration. The present perfect continuous ("have/has been + verb-ing") highlights how long an action has been ongoing, as in "She has been studying for three hours." The past perfect continuous ("had been + verb-ing") describes how long something had been happening before another past event, like "I had been waiting for two hours before the bus arrived." The future continuous ("will + be + verb-ing") describes an action that will be in progress at a specific future time, as in "At 9 PM, I will be watching a movie."
Irregular verbs must be memorized since they do not follow the regular "-ed" pattern. Common examples include go–went–gone, buy–bought–bought, teach–taught–taught, write–wrote–written, and speak–spoke–spoken. A frequent error is using the past simple form with present perfect, as in "I have went" instead of the correct "I have gone." Another common mistake is using the base form after "didn't," where "I didn't went" should be "I didn't go," because the auxiliary "did" already marks the past tense.