Present Subjunctive is usually used in certain fixed expressions that state a wish.
For all persons, including the third person singular, the Present Subjunctive is formed by the infinitive of the verbs without "to".
Verbs like suggest, insist, request, require, ask, order, demand, beg and other verbs of requesting, commanding, urging, or recommending are followed by the Present Subjunctive.
The Present Subjunctive is also used the construction it is important/vital/essential/necessary, etc...
It is necessary that he be punished.
I insist that she come now.
Peace be with you !
Heaven help us!
The doctor recommended that he stop smoking immediately.
