It is necessary that…
Il faut que…
It is necessary that…
Il est nécessaire que…
It is important that…
Il est important que…
It is essential that…
Il est essentiel que…
It is natural that…
Il est naturel que…
It is a shame that…
Il est dommage que…
It is best that…
Il vaut mieux que…
It is good/bad that…
Il est bon/mauvais que…
It is normal that…
Il est normal que…
It is unfair that…
Il est unjuste que…
When using infinitive verbs, when do you use ‘de’?
If the phrase starts with ‘Il est…’ you use ‘de’. If not, then don’t use ‘de’ and just use the verb.