Imperfect
Preterite
Present
Dirty Dozen
Imperfect or Preterite
100

Imperfect: What is the yo form ending of AR verbs?

ABA

100

Preterite: What is yo form ending of AR Verbs?

é

100

Present: what is the yo ending of an AR verb?

o

100

What does estar turn into?

Estuv

100

He was eating his apple.

Imperfect

200

Imperfect: What is usted form ending of ER Verbs?

ía

200

Preterite: What is usted form ending of ER Verbs?

200

Present: What is the usted form ending of an ER verb?

e

200

What does traer turn into?

traj

200

He killed her sister in the winter.

Preterite

300

Take (Nosotros)

tomabamos

300

Comer (Nosotros)

Comimos

300

Estar (yo)

Estoy

300

What does caber turn into?

cup

300

When telling the past time

Imperfect

400

(You are) mi favorito.

eras

400

(I ran) en esa carrera.

Corrí

400

Ser (nosotros)

somos

400

Le (dar) un regalo para su cumpleaños.

dieron

400

When talking about a sequence of past actions

Preterite

500

Correr (Vosostros)

Corrias

500

Dormir (Vosotros)

Dormisteis

500

Die (Vosotros)

moristeis

500

(Saber (Vosotros)) más de lo que pensabas

supisteis

500

Which is appropriate? 

¿A qué hora ____ tus tareas?

terminaste or terminabas 

Terminaste