Subjunctive – impersonal expressions

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The subjunctive is used: after certain impersonal expressions.

Here is a list of common impersonal expressions that introduce an aspect of uncertainty, and therefore trigger the use of the subjunctive.

conviene que ...
it’s advisable that ...
es aconsejable que ...
it’s advisable that ...
es bueno que ...
it's good that ...
es difícil que ...
it's difficult that ...
es dudoso que ...
it's doubtful that ...
es fácil que ...
it's easy for ...
es fantástico que ...
it's fantastic that ...
es importante que ...
it's important that ...
es imposible que ...
it's impossible that ...
es improbable que ...
it's unlikely that ...
es incierto que ...
it's uncertain that ...
es increíble que ...
it's incredible that ...
es (una) lástima que ...
it's a shame that ...
es malo que ...
it's bad that ...
es mejor que ...
it's better that ...
es menester que ...
it's necessary that ...
es necesario que ...
it's necessary that ...
es posible que ...
it's possible that ...
es preciso que ...
it's necessary that ...
es preferible que ...
it's preferable that ...
es probable que ...
it's likely that ...
es raro que ...
it's rare that ...
es ridículo que ...
it's ridicuous that ...
es terrible que ...
it's terrible that ...
más vale que ...
it's better that ...
ojalá que ...
if only he would ...
puede ser que ...
it could be that ...


 

Remember, there are also impersonal expressions that trigger the use of the indicative mood, since they introduce a quality of certainty or objectivity. Here's a partial list of such expressions:

es evidente que ...
it’s certain that ...
es obvio que ...
it’s obvious that ...
es verdad que ...
it's true that ..
no es dudoso que ...
it’s not doubtful that ...
no hay duda que ...
there’s no doubt that ...