One of the most common uses of the subjunctive
is after verbs of willing, such as querer (æto wantÆ), desear
(æto wantÆ), insistir en (æto insist onÆ), mandar (æto orderÆ),
preferir (æto preferÆ), prohibir (æto prohibitÆ), recomendar
(æto recommendÆ), decir (æto tellÆ someone to do something), pedir
(æto askÆ someone to do something), and permitir (æto permit). Notice
in the examples of the use of the subjunctive with the verbs of willing
in the settings and dialogues, there is one person speaking who wants another
person to do something. That is, there must be a change of subject in order
to use the subjunctive: one subject wants to influence the other subject
to do something. Thomas quiere que la operadora llame...; Thomas
quiere que la secretaria le indique...; Thomas quiere que el camarero
le traiga..., etc. The subjunctive is used after the conjunction que
in the subordinate clause of the sentence. If there is no change of subject,
the subjunctive is not used: Thomas quiere comer; Thomas quiere
llamar; Thomas quiere encontrar..., etc.