εἰμί to be versus εἶμι I'll go

 

Like in most languages, the verb to be is irregular in practically all its forms, tenses and moods.
And so is the verb to go, deceptively similar to to be in its present tense complex, and future. To see the similarities, and differences of course, more clearly I've made some tables comparing those 2 in their various morphs.

 
1   Present and Future  
2   Infinitive, participle, imperative
3   Imperfect  
4   subjunctive and optative