| (ii)    Past | 
                    
                      | The past progressive aspect is formed by suffixing -a:  , which indicates the progress to the past stem of the verb in case of verbs taking -u as the verbal participle marker. In case of verbs taking -i as the verbal participle marker, the suffix -ko   is suffixed to the verbal participle form of the verb. | 
                    
                      |  | 
                    
                      | The progress indicator is followed by the past tense form of the auxiliary verb iru ‘to be’ and PNG. | 
                    
                      | 
                        
                          | ure-c-a:   -ind-PNG |  | > |  |  
                          |  ureca:  ind-PNG |  |  | ‘was smearing’ |  
                          | a  e-c-a:   -ind-PNG |  | > |  |  
                          |  |  |  | ‘was sharpening’ |  
                          | na  a-nd-a:   -ind-PNG |  | > |  |  
                          |  |  |  | ‘was walking’ |  
                          | nane-nj-a:   -ind-PNG |  | > |  |  
                          | nanenja:  ind-PNG |  |  | ‘was becoming wet' |  
                          | pa:  -i-ko   -ind-PNG |  | > |  |  
                          |  |  |  | ‘was singing’ |  
                          | pa:r-i-ko   -ind-PNG |  | > |  |  
                          | pa:riko  ind-PNG |  |  | ‘was flying’ |  
                          | na  a-t-i-ko   -ind-PNG |  | > |  |  
                          |  |  |  | ‘was making to walk’ |  | 
                    
                      |  | 
                    
                      | ava:  u    nila    ureca:   indalu 1        2             3
 | 
                    
                      |  | 
                    
                      | ‘She    was    smearing    the    floor’ 1                    3                   2
 | 
                    
                      |  | 
                    
                      | ave    polatu    u:yiko   inda 1        2               3
 | 
                    
                      |  | 
                    
                      | ‘He    was    ploughing    the    land’ 1                    3                    2
 |