Spanish language Q&A Forum

If the presence of “a” after a verb means it is “Ir” a not “ser”, Then why is  “yo fui de fiesta an Ibiza” also conjugated “as ir?” The verb is not followed by “a”. Only the noun is followed by a. So why is it “I went,” and not “I was at”?

I find this very confusing. Does the rule apply to a and de alike ?

Why is the answer !Los coches que venden aquí son espectaculares!

It looks fairly similar to me?

to add : 

"doctor/a" for doctor

"supervisor/a" ; "gerente/dirigente ; manager (voz inglesa)"  for manager/supervisor

"representante" for representative, agent, manager

Is there any advice to practice the rythm of spanish?

Él habría abierto la puerta.He would have opened the door.The speaker really says Habriabierto. 
I think spanish should be taught this way but then how would that work?

Hola!
La segunda pregunta de la prueba dice:
Espero que ____ el avion a tiempo.
I hope that (we will get) the plane on time. 

Elegí "tómaremos" en las opciones. Porque tomar en futuro de subjuntivo es esto - we will take. 
Pero Kwiziq me dijiste que la opcion correcta es "tomemos". Pero esta opcion está en presente de subjuntivo - we take.
Puede explicarme por qué me equivico?
Gracias!

Se puede usar así en vez de "de esta manera?"

Gracias!

This grading of this question appears to be an error on the part of Progress. Conditional Perfect is the answer specified, which is "no habríamos muerto" and is the answer that I provided  The answer from Progress is given as "no hubiéramos muerto" and is Preterito Plumamperfecto Subjuntivo, not Condicional Perfecto.