Chapter 9 - The “ing” form of verbs
Similar to English, the “ing” form of a verb is formed by taking the stem of a verb, and adding an ending.
An example from English is the verb “walk”; we just add “ing” to form “walking”. A similar process occurs in Italian, namely that certain endings are added to the verb stems.
With one exception (the verb essere), all of the “ing” verb forms, called gerunds, are formed by using the tu form of the imperfect past tense as the source of the stem.
The imperfect past tense ending is dropped, leaving the stem. Then, the ending (-ndo) is added to make the gerund.
Pronunciation note: Without exception, all gerunds are accented on the second to last vowel.
Group 1 verbs end in -are. Using the verb parlareas the example, the tu form of the imperfect past tense of parlare is parlavi.
The stem is parla-, and the ending is -vi. The ending is dropped, and the stem (parla-) is used to form the gerund. Thus, parla + ndo = parlando.
other examples from this group follow (the stem is shown in bold type)
Infintive  | 
    Imperfect  | 
    Gerund  | 
  
dare, to give  | 
    davi  | 
    dando  | 
  
presentare, to present  | 
    presentavi  | 
    presentando  | 
  
saltare, to jump  | 
    saltavi  | 
    saltando  | 
  
In group 1, there are no exceptions.
Group 2 verbs end in -ere or -rre. Using the verb sapere as the example, the tu form of the imperfect past tense of sapere is sapevi. The stem is sape-, and the ending is -vi. The ending is dropped, and the stem
(sape-) is used to form the gerund. Thus, sape + ndo = sapendo.
other examples from this group follow (the stem is shown in bold type)
Imperfect  | 
    Gerund  | 
  |
assụmere, to assume  | 
    assumevi  | 
    assumendo  | 
  
chiụdere, to close  | 
    chiudevi  | 
    chiudendo  | 
  
scrịvere, to write  | 
    scrivevi  | 
    scrivendo  | 
  
Using the verb addurre as the example, the tu form of the imperfect past tense of addurre is adducevi. The stem is adduce-, and the ending is -vi. The ending is dropped, and the stem (adduce-) is used to form the gerund. Thus, adduce + ndo = adducendo.
other examples from this group follow (the stem is shown in bold type)
Infintive  | 
    Imperfect  | 
    Gerund  | 
  
porre, to put  | 
    ponevi  | 
    ponendo  | 
  
produrre, to produce  | 
    producevi  | 
    producendo  | 
  
trarre, to draw  | 
    traevi  | 
    traendo  | 
  
In group 2, the only exception is the verb ęssere, the gerund of which is essendo.
Originally, all of the verbs which are forms of the verb dire and fare were part of group two.
For the purposes of forming the  gerund, they are still classified in that way.   Thus
              Infinitive                                 Imperfect                    Gerund
            dire, to say                              dicevi                           dicendo
| Like dire: | benedire, to bless | contraddire, to contradict | 
| disdire, to retract | interdire, to interdict, prohibit | maledire, to curse | 
| predire, to predict | ridire, to repeat | ribenedire, to bless again | 
fare, to do facevi facendo
| Like fare: | assuefare, to accustom, inure | contraffare, to counterfeit | disassuefare, to give up a habit | 
| disfare, to undo | liquefare, to liquify | putrefare, to putrify | |
| rarefare, to rarefy | rifare, to do over, repeat | sfare, to undo, to thaw, melt | |
| soddisfare, to satisfy | soprafare, to overwhelm | strafare, to do too much, overdo | |
| stupefare, to stupefy | torrefare, to roast | tumefare, to swell | 
Group 3 verbs end in -ire. Using the verb partireas the example, the tuform of the imperfect past tense of partireis partivi.
The  stem is parti-, and the ending is -vi.  The final “i” of  the stem is changed to “e”, making the stem parte-.  Thus, parte + ndo= partendo.
              other examples from this group follow (the stem is shown  in bold type)
              Infinitive                                 Imperfect                    Gerund
              finire, to end                            finivi                            finendo
              venire, to come                        venivi                           venendo
In group 3, there are no  exceptions (dire and its compounds are treated as part of group 2).
The use of the gerunds in  Italian is quite different than English, and they are used far less frequently.
  1. with the verb stare (to be), and with verbs of motion to stress that an activity is in progress.
              Io sto parlando.                                               I  am talking.
              Continuiamo studiando italiano.                    We continue studying Italian.
  Past forms (such as Io stavo parlando; I was  talking) are generally replaced by the imperfect tense.
  2. to indicate the means the  action of the main verb was carried out
              Lei rispose indicando la direziọne.                 She replied by indicating the direction.
  3. to indicate an attitude
              Parlando francamẹnte,  mi dispiace.               Speaking frankly,  it doesn’t please me.
  4. to explain the  circumstances surrounding the main verb
              Essendo a servizio da molto, la mạcchina è logora.   Being in service a long time, the car is worn out.
              Vincendo la corsa, la squadra celebrava.                  Upon winning the race, the team celebrated.
In English, gerunds are often used to describe things (“a winding road”).
When these usages occur in Italian, the gerund will have a slightly  different form, with the ending “do” replaced by “te”
              example:          l’esercito occupante (the occupying army)
After prepositions, the  infinitive, not the gerund, is used.
              She entered without saying anything.            Lei entrò senza dire niente. 
              We talked instead of  playing tennis.             Parlammo in vece di giocare tennis.
In English, it is common to  use gerunds as the names of things, especially in reference to activities.  In these cases, Italian uses the infinitive,  not the gerund.
              example:          Swimming  is good exercise.   Nuotare è buon esercicio.