Spanish language Q&A Forum

In a sentence like "I don't know what he knows" or "I don't know if he knows" the sentence can express doubt or merely be a statement of fact. Wouldn't the choice of whether to use the indicative or subjunctive depend on what you are trying to convery (ie:  "No sé lo que sepa" if I am trying to express doubt about what he knows but "No sé lo que sabe" if I am simply stating the fact that I don't know what he knows)?

Can you explain what an impersonal verb is an how I know when to use it, please?

One of the examples is:

Su actitud se volvió violenta de repente.

Is it correct to assume that the change is a lasting one, as with someone who got hit on the head with a shovel and after that was a violent person?

Compared to:

Su actitud se puso violenta de repente.

In this case, cowboys in a saloon in a Western movie insult someone and he stands up quickly and draws his gun?

Just want to double check that these differences are correct.  Thanks.

I wish it was better explained when to use this tense instead of just giving examples 

In the explanatory pop-up for "Como se prepara una tortilla de patatas:" https://spanish.kwiziq.com/revision/grammar/expressing-instructions-and-general-statements-with-the-impersonal-se-one. 

I'll spend some time on this exercise because I find these uses of "se" to be very interesting.

Also this was my first encounter with "echa/echan." There does not appear to be a lesson dedicate to its conjugation, but there is this which seems to be sufficient: https://spanish.kwiziq.com/revision/grammar/expressing-instructions-and-general-statements-with-the-impersonal-se-one.

>In sentences where the indirect object is represented by "a + pronoun", and it is at the beginning of the sentence, for example  "a mí, a tí, a ella", it is necessary to repeat the indirect object by using the "short" pronoun (me, te, le, nos, os, les) in the same sentence.

I think this should be reworded. That "and it is at the beginning of the sentence" makes it seem like you don't need the shrot pronoun if you put the "a + pronoun" elsewhere in the sentence. I know one of the examples and the little tip box later clarify this, but I still think rewording that paragraph would help. 

Hi, can I say una bolsa is a handbag as well as un bolso? 

I learned the hard way that I shouldn't try to reason it out.  Just use aun when there is a preposition.

aun con

aun sin

and even with the clause words, like the lesson says

aun si

aun cuando

Sometimes you just have to use tricks until you have a better understanding of the larger rule!

Alicia, ¿a qué hora te ducha por la mañana?

Good lesson.  I like this concept of partitives.

Can we use "uno de" in place of "alguno de" to mean "one of"?  Or is "alguno" only used in this context in Spanish?

Also, is there a list of partitives that use "de", such as "cada uno de" or "pocos de"?

Thanks!