When do we use imperfect versus preterite?

Question

In what situations do we use preterite? In what situations do we use imperfect?

Answer 1

Comparing The Preterit (Pretérito) and The Imperfect (Imperfecto)

Preterit – Pretérito (Past - Completed)	?	Imperfect – Imperfecto (Past - Continuous)
-----------------------------------------------------	?	-------------------------------------------------------------
This tense expresses an action in the past that was completed at some time in the past. The specific past actions will have been performed (1)- at a fixed point in time (2)- a specific number of times in the past (3)- during a specific amount of time in the past	?	This tense expresses an action or a state of being in the past that was ongoing or continuous in the past. The action(s) in the past will have these qualities (1)- they took place repeatedly in the past (2)- they were ongoing or continuous in the past (3)- they occurred over an extended period of unspecified time in the past
	?

This is a basic comparison. There is certainly more detail and in particular, regarding the imperfect. For the additional more detailed information and examples, see Paralee Whitmire's Reference Pages by following these links
For the preterit ----> El Pretérito , and
For the Imperfect ----> El Imperfecto

You will also find that our teacher Paralee Whitmire explains the Preterite and the Imprefect in her lesson 2.10, found here ----> Preterite & Imperfect

It's nice to see you around the forum, Moe. - Izanoni1, Sep 26, 2011

Answer 2

The preterite tense is a specific time in the past.

ex: yesterday, last summer, last week...

The imperfect tense refers to a general time period in the past.

ex: when i was young..., when i was 3..., as a child....