Spanish language Q&A Forum

Please could you explain the following:

Los chicos estaban sentados en el borde de la piscina. correct
Los chicos estaban sentando en el borde de la piscina. not correct
The boys were sitting on the edge of the pool.

I am pretty sure that I have been taught to use the gerund rather than than the past participle in this kind of an example.

Many thanks  (Mainland Spain)

¿Enserio güey? Qué tal? Formal?

please, help to understand why when I am using formal question

tiene un boligrafo is correct but

tiene usted un boligrafo marked as incorrect

I want you to help me with simple way of understanding Spanish preterite please

Hello,

I am trying to get an overview of Spanish adjectives.

Am I correct to assume that adjectives that end in -o or -a are regular and everything else is irregular?

This would mean that the following are irregular:

- masculine adjectives that end in -a or -e
- adjectives that end in -z or -l

- adjectives that end in -án, ón, -or

- adjectives that end in -ar

Is this correct?

Are there also other adjectives groups/endings?