it v-link ADJ that
The 'important' and 'necessary' group
These adjectives indicate that the event or situation indicated by the that-clause is important or necessary.
It's important that we make everyone stand up and pay attention.
At home, it is sometimes necessary that children have to share rooms.
In emergency situations it is vital a ship in distress is found quickly.
The verb group in the that-clause sometimes includes the modal should.
It was vital that everyone should work together to save the country.
The verb group in the that-clause is sometimes in the subjunctive.
compulsory critical crucial essential imperative important indispensable mandatory necessary paramount unnecessary urgent vital
It is important that a pregnancy be planned.