SPANISH 102 - Pretérito

Is there any way to memorize the ending of the irregular verbs? Most of my students have that problem. There are so many irregular verbs...
¿Cómo lo haces?

Spanish 101 - Conjugation

Did you get it? Some of my students didn't.
One of my students asked me: "How do you make a sentence in Spanish?
Can you help her?
Gracias,

The inconvenient double negative in Spanish

My students have always problems with the idea of the double negative. In Spanish, we say "no tengo nada" (I do not have nothing). To me, it makes sense because you can not have nothing, once you say "I have" you should have something...
¿me equivoco?