Subjunctive

Forms

If we know the indicative forms, which we should by now, the subjunctive forms are easy to recognize:
The endings are all long, always, with no exception:
      λέγομεν is indicative for "we really do speak"
      λέγωμεν means: "Let's speak", or: "Shall we speak? maybe yes, maybe no...

 

Summary of changes

   ο    becomes    ω   
   ου    becomes    ω   
   ε    becomes    η   
   ει    becomes    ῃ   

 

Normal Verbs

 Indicative: fact     subjunctive: non-fact 
 we learn   so that   we may know 
 μανθάνω   ἵνα   γιγνώκω 
 μανθάνεις   ἵνα   γιγνώκῃς 
 μανθάνει   ἵνα   γιγνώκ 
 μανθάνομεν   ἵνα   γιγνώκωμεν 
 μανθάνετε   ἵνα   γιγνώκητε 
 μανθάνουσιν   ἵνα   γιγνώκωσιν 

 

the Verb 'TO BE'

 Indicative: fact        subjunctive: non-fact 
 we are not something   so that we should/may not be something else. 
 οὐκ ἀργός    εἰμι   ἵνα μὴ   πένης   ὦ 
 οὐκ ἀργὸς   εἶ   ἵνα μὴ   πένης   ῇς 
 οὐκ ἀργός    ἐστιν   ἵνα μὴ   πένης   ῇ 
 οὐκ ἀργοί    ἐσμεν   ἵνα μὴ   πένητες   ὦμεν 
 οὐκ ἀργοί   ἐστε   ἵνα μὴ   πένητες   ἦτε 
 οὐκ ἀργοί   εἰσιν   ἵνα μὴ   πένητες   ὦσι. 

 
As you can see, the verb to be for once is really easy: just use the endings of regular verbs.

 Additional Note 

As you can see from the last table, we always use "not" for any kind of negation. But the Greeks make a difference:
  • οὐ, οὐκ, οὐχ for negating facts, for saying that something is definitely not ..... The stress is on not fact: is not, does not, did not, will not, cannot ...
  • Because subjunctive verb-forms never express fact pure and simple, we cannot use οὐ but have to use μή, always.