| INDICATIVE |  | 
|  Present |  | 
I sum   You sum   He/She/It sums   We sum   You sum   They sum  
  |  Io sommo  Tu sommi Egli/Ella/Esso somma Noi sommiamo Voi sommate Essi/Esse/Loro sommano
  | 
|  Imperfect |  | 
I was suming   You were suming   He/She/It was suming   We were suming   You were suming   They were suming  
  |  Io sommavo Tu sommavi Egli/Ella/Esso sommava Noi sommavamo Voi sommavate Essi/Esse/Loro sommavano
  | 
|  Perfect |  | 
I sumed   You sumed   He/She/It sumed   We sumed   You sumed   They sumed  
  |  Io sommai Tu sommasti Egli/Ella/Esso sommò Noi sommammo Voi sommaste Essi/Esse/Loro sommarono
  | 
|  Perfect |  | 
I have sumed   You have sumed   He/She/It has sumed   We have sumed   You have sumed   They have sumed  
  |  Io ho sommato Tu hai sommato Egli/Ella/Esso ha sommato Noi abbiamo sommato Voi avete sommato Essi/Esse/Loro hanno sommato
  | 
|  PlusPerfect |  | 
I had sumed   You had sumed   He/She/It had sumed   We had sumed   You had sumed   They had sumed  
  |  Io avevo sommato Tu avevi sommato Egli/Ella/Esso aveva sommato Noi avevamo sommato Voi avevate sommato Essi/Esse/Loro avevano sommato
  | 
|  Plusperfect |  | 
I had sumed   You had sumed   He/She/It had sumed   We had sumed   You had sumed   They had sumed  
  |  Io ebbi sommato Tu avesti sommato Egli/Ella/Esso ebbe sommato Noi avemmo sommato Voi aveste sommato Essi/Esse/Loro ebbero sommato
  | 
|  Future |  | 
I will sum   You will sum   He/She/It will sum   We will sum   You will sum   They will sum  
  |  Io sommerò Tu sommerai Egli/Ella/Esso sommerà Noi sommeremo Voi sommerete Essi/Esse/Loro sommeranno
  | 
|  Future perfect |  | 
I will have sumed   You will have sumed   He/She/It will have sumed   We will have sumed   You will have sumed   They will have sumed  
  |  Io avrò sommato Tu avrai sommato Egli/Ella/Esso avrà sommato Noi avremo sommato Voi avrete sommato Essi/Esse/Loro avranno sommato
  | 
| SUBJUNTIVE |  | 
|  Present |  | 
I (that )may sum   You (that )may sum   He/She/It (that )may sum   We (that )may sum   You (that )may sum   They (that )may sum  
  |  Io sommi Tu sommi Egli/Ella/Esso sommi Noi sommiamo Voi sommiate Essi/Esse/Loro sommino
  | 
|  Imperfect |  | 
I (that )might sum   You (that )might sum   He/She/It (that )might sum   We (that )might sum   You (that )might sum   They (that )might sum  
  |  Io sommassi Tu sommassi Egli/Ella/Esso sommasse Noi sommassimo Voi sommaste Essi/Esse/Loro sommassero
  | 
|  Perfect |  | 
I (whether) sumed   You (whether) sumed   He/She/It (whether) sumed   We (whether) sumed   You (whether) sumed   They (whether) sumed  
  |  Io abbia sommato Tu abbia sommato Egli/Ella/Esso abbia sommato Noi abbiamo sommato Voi abbiate sommato Essi/Esse/Loro abbiano sommato
  | 
|  Pluperfect |  | 
I (whether) had sumed   You (whether) had sumed   He/She/It (whether) had sumed   We (whether) had sumed   You (whether) had sumed   They (whether) had sumed  
  |  Io avessi sommato Tu avessi sommato Egli/Ella/Esso avesse sommato Noi avessimo sommato Voi aveste sommato Essi/Esse/Loro avessero sommato
  | 
| CONDITIONAL |  | 
|  Present |  | 
I would sum   You would sum   He/She/It would sum   We would sum   You would sum   They would sum  
  |  Io sommerei Tu sommeresti Egli/Ella/Esso sommerebbe Noi sommeremmo Voi sommereste Essi/Esse/Loro sommerebbero
  | 
|  Perfect |  | 
I would have sumed   You would have sumed   He/She/It would have sumed   We would have sumed   You would have sumed   They would have sumed  
  |  Io avrei sommato Tu avresti sommato Egli/Ella/Esso avrebbe sommato Noi avremmo sommato Voi avreste sommato Essi/Esse/Loro avrebbero sommato
  | 
| IMPERATIVE |  | 
|  Present |  | 
let me sum   sum   let him sum   let us sum   sum   let them sum  
  |  Io - Tu somma  Egli/Ella/Esso sommi Noi sommiamo Voi sommate Essi/Esse/Loro sommino
  | 
| PARTICIPLE |  | 
|  Present |  | 
suming  
  |  sommante
  | 
|  Perfect |  | 
sumed  
  |  sommato sommati...
  | 
| INFINITIVE |  | 
|  Present |  | 
to sum  
  |  sommare
  | 
|  Perfect |  | 
have sumed  
  |  avere sommato
  | 
| GERUND |  | 
|  Present |  | 
suming  
  |  sommando
  | 
|  Perfect |  | 
having sumed  
  |  avendo sommato
  |