Breakdown of Creo que el problema es real.
ser
to be
el problema
the problem
que
that / than
creer
to believe
Questions & Answers about Creo que el problema es real.
Since this sentence is about a belief, why does it use the indicative 'es' instead of the subjunctive 'sea'?
In Spanish, affirmative phrases like creo que or pienso que declare what you perceive to be a fact, so they take the indicative mood (es). You only use the subjunctive if you deny that belief by making it negative. If the sentence were 'I don't believe the problem is real', it would be No creo que el problema sea real.
Why is it 'el problema' when the word ends in an 'a'?
Even though it ends in 'a', problema is masculine. It belongs to a specific group of Spanish words of Greek origin that end in '-ma' and are always masculine. Other common examples you have probably learned are el sistema, el programa, and el tema.