Spanish language Q&A Forum

How do learners remember when to use the "de" described above? Do native speakers learn it only from growing up with the language? I don't see any particular rule for knowing when to use the "de" and when not to--how "wrong" is it to omit the "de?"

there is this sentence = the deceased were only remembered on November 1st.

the answer is = solo se recordaba a los difuntos el primero de noviembre.

But is using acordarse acceptable as well? 

= solo se acuerdaba ?

second question is that, for a few years = unos pocos años or pocos años.

can we use unos cuentos años or un par de años?

i do not understand why one is preferred over the other.

by the way, the audio seems to have some problems as i cant play it.

thanks

Daba escalafríos andar por el pasillo. Is there no need for "me" or "nos" or are they optional? "Me daba escalafríos"?

I am still confused when to use and when to omit the definite article.  I end up guessing, which is sometimes right and often wrong.  Example 1: "En lo que se refiere a incendios forestales." We're talking about forest fires in general and there is no definite article "los".  Example 2: "Es importante que no nos olvidemos del cambio climatico."  The English statement is that we must not forget about climate change in general.  This time there is the definite article "el" or "del".  Is there a rule or guideline that might clear this up for me?  Thanks.