[I will pay you when Juan repays me.]

   Te  pagaré  cuando Juan me  pague .

[Carlos will call us when the meeting ends.]

Carlos nos  llamará  cuando  termine  la reunión.

[I’m going to clean the house when I have time.]

 Voy a limpiar  la casa cuando yo  tenga  tiempo.

[We’ll paint the house when Walmart reduces prices.]

Pintaremos la casa cuando Walmart baje los precios.

1- ¿Cuándo vas a Duluth?  (hacer buen tiempo)

2- ¿Cuándo volverán ustedes?  (no tener dinero)

3- ¿Cuándo irá Mónica a España?
                                     (su esposo poder ir con ella)

llamar                 comer                    escribir

pensar                volver                    dormir

tener                   poner                    traer

ser                      estar                     dar

4-  No es necesario que vengamos.

            ▼

     _____________________________________________

        It wasn’t necessary that we come.

5- Ellos le recomiendan a Beatriz que coma más.

                         ▼

     _____________________________________________

     They recommended to Beatriz that she eat more.

6- Necesitamos que Pablo nos llame.

            ▼

     _____________________________________________

     We needed that Pablo call us.

7- If we could, we would travel to China.

     _____________________________________________

8- If they were younger, my grandparents would go
                                                                     with us.

     _____________________________________________

9- Would you (tú) study music if you had the time?

     _____________________________________________

Párrafo P/I #1

            La semana pasada yo ______________ a Columbia Mall a una
                                                1-    ir

tienda donde yo ______________ un perro marrón y blanco.    Yo
                            2-  comprar

______________ $70.  Pero cuando yo _____________ pequeña,
   3-   pagar                                                 4-    ser

yo ______________ un perro negro, y él ______________ muy
       5-     tener                                             6-     ser

curioso, y por eso nosotros siempre lo ________________ «Snoopy».
                                                               7-   llamar

Él ______________ 15 años cuando (él) ______________.
        8-   tener                                            9-     morir

                Last week I went to Columbia Mall to a shop where I bought a brown and white dog.  I paid $70.  But when I was little, I had a black dog, and he was very curious, and for that reason we always called him “Snoopy”.  He was 15 years old when he died.

Preterite tense is the simple (one-word in English) past.  The preterite refers to an action completed in the past:
 

I ate an apple. Comí una manzana. (The apple is gone.)

He read the book. Él leyó el libro. (He finished reading the book.)

Imperfect tense is a compound (more than one word in English) past.  The imperfect refers to the middle (after the beginning, before the end) but while the action was on-going.  NOTE!  The action most likely was completed at some point, but the speaker’s interest is in the middle.  Most often this type of action is expressed “was/were talking (eating, driving), but ¡OJO!, some people use the simple past here when they actually are referring to the middle.
 

I was sleeping at 8 AM.  Yo dormía a las 8.  (I went to sleep before       8, and woke up after 8.)

They were studying.... Ellos estudiaban.... (I don’t know when they  started or finished.)

The imperfect tense is also used for repeated actions (used to have, would drive) in the past.  ¡OJO!, some people use the simple past here when they actually are referring to a repeated action.

I used to visit (would visit) my grandmother almost every Sunday. Yo visitaba a mi abuela casi todos los domingos. (Even without “almost every Sunday”, visitaba tells you it was a       repeated action.)

Preterite and Imperfect in the same sentence.
Often the two tenses can be combined with each other.

While Sam was in the room, I ate an apple. Mientras Sam estaba en el cuarto, comí una manzana. (The apple got eaten while Sam was there, but I don’t care when       he arrived or left.)

I was sleeping at 8 AM when Beatriz called (phoned) me. Yo dormía a las 8 de la mañana, cuando Beatriz me llamó. (My sleeping, which was in progress before 8, was interrupted       by the phone call.)

Carlos read War and Peace while he was in the 9th grade. Carlos leyó La guerra y la paz mientras estaba en el noveno       grado. (He was in the 9th grade both before and after he started and      finished the book.)

Multiple preterite verbs or multiple imperfect verbs in the same sentence.
A series of either preterite or imperfect verbs can be used in one sentence.
 

I got up at 7, showered, got dressed, ate breakfast and left the       house at 9. Yo me levanté a las 7, me duché, me vestí, desayuné, y salí de la       casa a las 9.  (Each action got completed before the next one began.)

The other day while I was washing the dishes, my husband       was repairing a lamp. El otro día mientras yo lavaba los platos, mi esposo reparaba una       lámpara. (Two actions were on-going at the same time. It’s not important       who got done first.)

“State” verbs (or verbs that represent a pre-existing condition)
There is a group of verbs that represents actions that do not generally have a clear beginning or end.  These verbs tend to be ones of being, feeling, seeming, wanting etc.  ALWAYS use the imperfect tense with the following verbs, unless a clear beginning or end is evident.