| Base form | Past Simple | Past Participle | |
| 
                             grind 
                             
            
             | 
                        
                             ground 
                             
            
             | 
                        
                             ground 
                             
            
             | 
                        |
| 
                             
                                -ing form
                             
                            grinding 
                             
            
             | 
                        
                             
                                s
                             
                            grinds 
                             
            
             | 
                        
The flour was ground from barley.
碾碎, 磨碎