Spanish language Q&A Forum

I'm having trouble consistently distinguishing between using 'a' or 'en' when talking about being somewhere.

For instance, in the dialog, "... Alberto estará  en la reunión...", 

Would we say "estará en la reunión" to mean someone will be 'in' the meeting, while "estará a la reunión" has a connotation indicating a location 'at' the meeting?

Or is it always customary to use 'en' in cases like this?

So ¿cómo está? is an incorrect answer for a child?

Don't remember ever hearing that one, only that it is okay to use the informal version with them.

Also you site is jumping past questions when I give the answer to a previous question, I know I should notice but your site shouldn't do that either.

It's happened a couple of time and I think I've done well on a test only to find out I didn't answer a couple of the questions.

Also there are drop downs that don't show some of the answer and lo and behold one of them is apparently the correct answer, which only confuses me because I end up picking the best sounding incorrect answer.

Hola, 

Is there any way I can get help besides taking quizzes here to understand the difference between Estar and Ser uses?

It seems like one of the quiz questions and the examples you give for past participles use the pretérito perfecto for what should be the pretérito indefinido as translated from English. Examples: we wouldn’t say I’ve written to my girlfriend if we wanted to say I wrote to my girlfriend or I’ve returned from work for I returned from work. Please explain why the perfecto is used in the statements and not the indefinido. 

Hola!

Quiero saber si los personas mexicano dicen "j" para "ll" y "y" o es un "y" sonido? Vivo en California y quiero sonar mas natural para mi comunidad. Gracias por todo!

(Sorry if my Spanish is broken, I just restarted learning)