The subjunctive mood is used to express doubt or uncertainty. It is almost always used in complex sentences where one clause depends on another (e.g. abbiamo comprato un cagnolino in modo che i bambini imparino a prendere cura degli animali ‘we bought a puppy so that the children can learn how to look after animals’), or where the subordinate clause depends on a main verb expressing uncertainty (dubito che lui possa farcela ‘I doubt if he can manage it’). However it can be found standing on its own, when used as an imperative form: vada via! ‘go away!’