Spanish language Q&A Forum

This goes against everything else I have learned or am learning in the classroom  - I cannot remember two sets of rules.  Any correct answer should be marked as correct, whether the so-called Latin American version or  Spanish version.   There doesn't need to be only 1 correct answer.

Would it be fair to say that tan is an adjective and tanta (o,as,os) is an adverb?

'You probably haven't had a good breakfast'  is translated as probablemente es que no habrás desayunado bien

My question is if the 'es que' is obligatory here?

Gracias

I am just wondering why some -ir and -erverbs use -iendo and the other take -yendo.  Does it have to do with the double vowel?  Like -uir -aer -eer? 

Contar bringing you to encontrar table is confusing me, as it shows yo encuentro instead of cuento which is the conjugation for contar

Since the question cannot be deleted (or I don't know how), let this comment stay here but I'll use the opportunity to tell you all to keep up with the excellent work as the few days I've been on here have really helped me better my Spanish skills!

Hola, Inma!

Cuáles son las oraciones correctas: 

1."No sabía si ERES mi amigo." o 2."No sabía si ERAS mi amigo."

La misma pregunta también aquí:

3."Quería saber si ERES mi amigo." o 

4."Quería saber si ERAS mi amigo."

Muchísimas gracias,

Miltcho

Hi, I also have a similar doubt. We are using sere in first example ( When I am older, I will be a doctor) i.e simple future but we are using vayan (subjunctive) in this statement:  Tendrán mucho frío cuando vayan a Escocia el próximo diciembre.

Why are we using vayan instead of iran (simple future) here like in first example?

Please help thank you!

Un bolígrafo también es una pluma. Si?