A past tense (abbreviated pst) is a grammatical tense that places an action or situation in the past of the current moment (in an absolute tense system), or prior to some other event, whether that is past, present, or future (in a relative tense system).
Present tense (abbreviated pres or prs) is a grammatical tense that locates a situation or event in present time. In English, the present may be used to express action in the present, a current state of being, an occurrence in the future, or an action that started in the past and continues.
In grammar, a future tense (abbreviated fut) is a verb form that marks the event described by the verb as not having happened yet, but expected to happen in the future (in an absolute tensesystem), or to happen subsequent to some other event, whether that is past, present, or future (in a relative tense system).
simple past tense
Completed Action in the Past
Use the Simple Past to express the idea that an action started and finished at a specific time in the past. Sometimes, the speaker may not actually mention the specific time, but they do have one specific time in mind.
past continous tense
interrupted Action in the Past
Use the Past Continuous to indicate that a longer action in the past was interrupted. The interruption is usually a shorter action in the Simple Past. Remember this can be a real interruption or just an interruption in time.
past perfect tense
Completed Action Before Something in the Past
The Past Perfect expresses the idea that something occurred before another action in the past. It can also show that something happened before a specific time in the past.
past perfect continous tense