Differences Between Past & Imperfect Tense

Updated April 17, 2017


Imperfect and past tense verbs show the difference in the timing of past actions The past perfect tense relates to an action that was completed at a time relative to another timed event. For example, "By 2000 they had married." The imperfect tense, refers to an action that continued for some time. And example might be "I was living there before 2005."


The aspect of a verb phrase shows how the speaker of a sentence regards the action communicated by the main action verb, whether it was past perfect or imperfect. In English, this involves the use of the verbs "to have" or "to be" followed by the main action verb of the sentence to convey a subtle difference in the timing of an action. The imperfect tense is identified by the use of the words "was" or "were" which show that the past action was continuous; for example, "I was punching." The past perfect uses "has," "had" or "been" to show that the action was completed at a set point in time; for example, "I had punched."


By their different applications of timing and aspect, past perfect and imperfect verb phrases are used to show the varying ways that actions occurred in the past. The imperfect tense is used to describe a completed event that occurred over a period of time or an event that occurred within an event. The perfect tense is used to show a brief action completed at a single point in time or to show which of two events occurred before the other.


Examples help to illustrate the subtle difference between the perfect past tense and the imperfect tense in action:

Simple past tense -- I swam/we swam

imperfect tense -- I was swimming/we were swimming

perfect past tense --I had swum/ we had swum

past perfect continuous -- I had been swimming/they had been swimming

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About the Author

Natasha Sheldon has been a writer since 2000. Her work can be found on several websites including Travel Thru History and Italianvisits.com. Sheldon holds a Bachelor of Arts in ancient history and archaeology from the University of Leicester and a Master of Arts in ancient history and historiography from the University of Bristol.