1. The Subjunctive to Express Volition
(El subjuntivo usado para expresar volición)
¿Necesitan que los lleve a casa?

2. The Subjunctive to Express Volition
Verbs of volition express the wishes, preferences, suggestions, requests, and implied commands of the speaker. When the verb in the main clause expresses volition, the verb in the noun clause is expressed in the subjunctive mode. Following are verbs of volition.
aconsejar
to advise
pedir (i, i)
to ask
decir
to tell
permitir
to permit
desear
to wish
prohibir
to prohibit
insistir (en)
to insist
querer (ie)
to want
mandar
to order
recomendar (ie)
to recommend
necesitar
to need
sugerir (ie, i)
to suggest

3. The Subjunctive to Express Volition
With the concept of volition, the subject of the verb in the main clause tries to influence the subject of the dependent noun clase, in other words, to cause or prevent something.
Carmen (querer) + yo (ir) 
Carmen quiere que yo vaya con ella de vacaciones.
Carmen wants me to go with her on vacation.
ustedes (necesitar) + yo (llevar) 
¿Necesitan que los lleve a las montañas?
Do you need (for) me to take you to the mountains?
mi novia (desear) + yo (recoger) 
Mi novia desea que yo recoja las maletas.
My girlfriend wants me to pick up the luggage.

4. The Subjunctive to Express Volition
As mentioned in a previous presentation, when there is no change of subject for the two verbs, we use the infinitive instead of a noun clause.
Sofía (desear) + Sofía (ir) 
Sofía desea ir a pescar.
Sofía wants to go fishing.
yo (querer) + yo (montar) 
Yo quiero montar a caballo.
I want to go horseback riding.

5. The Subjunctive to Express Volition
Sentences using verbs such as aconsejar, decir, pedir, recomendar, and sugerir require an indirect object pronoun.
This pronoun refers to the subject of the dependent clause. Le
aconsejo que (Ud.) nade más.
I advise you to swim more.
Literally, I advise that you swim more.
Nos
piden que (nosotros) hagamos más ejercicio.
They ask us to exercise more.
Literally, They ask that we exercise more.

6. The Subjunctive to Express Volition
When verbs of communication such as decir and escribir are used in the main clause and the subject of the verb is simply reporting information (telling someone something), the indicative is used in the dependent clause.
INFORMATION
Julia le dice a Juan que llegamos mañana.
Julia tells Juan that we are arriving tomorrow.
Les escribo que volvemos el sábado.
I’m writing them (to inform them) that we’re returning on Saturday.
Here, the subjects are not trying to cause or prevent anything, but are merely informing someone of something.

7. The Subjunctive to Express Volition
If the verb in the main clause is used in the sense of a command (telling someone to do something), the subjunctive is used.
COMMAND
Julia le dice a Juan que llegue mañana.
Julia tells Juan to arrive tomorrow.
Les escribo que vuelvan el sábado.
I’m writing for them to return on Saturday.
Here, the subjects are clearly trying to influence someone.

8. FIN