
Regelmäßiges Verb: serve - served - served
Einfache Form | Form mit V-ing | 
| I could serve you could serve she could serve we could serve you could serve they could serve  | I could be serving you could be serving she could be serving we could be serving you could be serving they could be serving  | 
Perfekt | Perfekt mit V-ing | 
| I could have served you could have served she could have served we could have served you could have served they could have served  | I could have been serving you could have been serving she could have been serving we could have been serving you could have been serving they could have been serving  | 
Einfache Form | Form mit V-ing | 
| I couldn't serve you couldn't serve she couldn't serve we couldn't serve you couldn't serve they couldn't serve  | I couldn't be serving you couldn't be serving she couldn't be serving we couldn't be serving you couldn't be serving they couldn't be serving  | 
Perfekt | Perfekt mit V-ing | 
| I couldn't have served you couldn't have served she couldn't have served we couldn't have served you couldn't have served they couldn't have served  | I couldn't have been serving you couldn't have been serving she couldn't have been serving we couldn't have been serving you couldn't have been serving they couldn't have been serving  | 
Einfache Form | Form mit V-ing | 
| could I serve? could you serve? could she serve? could we serve? could you serve? could they serve?  | could I be serving? could you be serving? could she be serving? could we be serving? could you be serving? could they be serving?  | 
Perfekt | Perfekt mit V-ing | 
| could I have served? could you have served? could she have served? could we have served? could you have served? could they have served?  | could I have been serving? could you have been serving? could she have been serving? could we have been serving? could you have been serving? could they have been serving?  | 
Einfache Form | Form mit V-ing | 
| couldn't I serve? couldn't you serve? couldn't she serve? couldn't we serve? couldn't you serve? couldn't they serve?  | couldn't I be serving? couldn't you be serving? couldn't she be serving? couldn't we be serving? couldn't you be serving? couldn't they be serving?  | 
Perfekt | Perfekt mit V-ing | 
| couldn't I have served? couldn't you have served? couldn't she have served? couldn't we have served? couldn't you have served? couldn't they have served?  | couldn't I have been serving? couldn't you have been serving? couldn't she have been serving? couldn't we have been serving? couldn't you have been serving? couldn't they have been serving?  |