USE THE SUBJUNCTIVE IN CLAUSES PRECEDED BY:

1. an expression of INFLUENCE (indirect command):*	Quieren que funcione.*	Noun clauses (§46)
2. an expression of EMOTION:*	Es bueno que funcione.*
3. an expression of DOUBT or DISBELIEF:	No creen que funcione.
4. an expression of DENIAL:	No es verdad que funcione.
5. a hypothetical or nonexistent person or thing:	Buscan un programa que funcione.	Adjective clauses (§47)
6. a conjunction presenting a hypothetical or anticipated event:*	Lo usarán cuando funcione.  No lo usarán hasta* que funcione.	Adverb clauses (§50)
7. the conjunction "if" (si) for unlikely or contrary-to-fact events, (past subjunctive only):	Si funcionara, lo usarían. (Never use the present subjunctive after si)	"if" clauses (§52)
8. Ojalá (que), a menos que, no hay +nada/nadie/ningún+ que ("No hay nada que funcione")
* in these cases the infinitive is used when there is only one subject: Esperan hasta terminar. (they wait until they finish)