lAs you can see in
the example Juan quiere que su hermana cante con él. (Juan wants his sister to sing with him), there
must be two people involved in this
situation, Juan and his sister, one in
the main clause and one in the
subordinate clause. Therefore,
if there isn't a second person involved, there is no subjunctive but an infinive and there is no "que".
lJuan quiere que su hermana cante con él. (2 subjects = subjunctive and "que") but: Juan quiere cantar solo. (one subject,
Juan = no subjunctive
but an infinitive and no "que")
