How to use the subjunctive mood to express importance?

In American English, after it is important that (and other phrases expressing importance, necessity or recommendation), use the infinitive without to (subjunctive mood).

example sentence: It is important that you be natural on stage.
Solidify this and other rules

More rules like this

Phrase the Cat inviting to practise English Phrase the Cat waving

At you can study a brief grammar rule and start creating new phrases based on it right away.