a sentence correction
¡ Es una sorpresa que sólo tú fuiste en clase ayer !
Is it okay for me to use this structure like in english , "It's a surprise that....."
I still have a hard time choosing ser and estar in this case.
5 Answers
I would have said:
Me sorprende mucho que eras el único/la única que estuvo en clase ayer.
fuiste might be used instead of eras, not 100% sure.
delete, whoopsie, misunderstood the question 
On a related note, shouldn't the subjunctive be used here? Or am I just making stuff up? Jajaja
¡ Es una sorpresa que sólo tú fuiste en clase ayer !
Yes, you can say this, but it should be "a clase," however, it´s more natural to say "Me sorprende que .............."
¡Qué sorpresa que solo tú hayas ido a clase ayer!
Yes, it is.
To make it easier think of ser as if you were philosophizing about what we are, you see, when we're dealing with trascendental matters we'd, most likely, be using ser, for, temporal, worldly matters we'd, most likely again, use estar. The phrase "I think, therefore I am" would make no sense if you used estar.
Soy = I am, as in I exist.
Estoy = I am, as in I'm located at.., or I'm thin but I still can be fat.
