I could litter you could litter she could litter we could litter you could litter they could litter
Forma com V-ing
I could be littering you could be littering she could be littering we could be littering you could be littering they could be littering
Perfeito
I could have littered you could have littered she could have littered we could have littered you could have littered they could have littered
Perfeito com V-ing
I could have been littering you could have been littering she could have been littering we could have been littering you could have been littering they could have been littering
Negação
Forma simple
I couldn't litter you couldn't litter she couldn't litter we couldn't litter you couldn't litter they couldn't litter
Forma com V-ing
I couldn't be littering you couldn't be littering she couldn't be littering we couldn't be littering you couldn't be littering they couldn't be littering
Perfeito
I couldn't have littered you couldn't have littered she couldn't have littered we couldn't have littered you couldn't have littered they couldn't have littered
Perfeito com V-ing
I couldn't have been littering you couldn't have been littering she couldn't have been littering we couldn't have been littering you couldn't have been littering they couldn't have been littering
Forma interrogativa
Forma simple
could I litter? could you litter? could she litter? could we litter? could you litter? could they litter?
Forma com V-ing
could I be littering? could you be littering? could she be littering? could we be littering? could you be littering? could they be littering?
Perfeito
could I have littered? could you have littered? could she have littered? could we have littered? could you have littered? could they have littered?
Perfeito com V-ing
could I have been littering? could you have been littering? could she have been littering? could we have been littering? could you have been littering? could they have been littering?
Forma interro-Negação
Forma simple
couldn't I litter? couldn't you litter? couldn't she litter? couldn't we litter? couldn't you litter? couldn't they litter?
Forma com V-ing
couldn't I be littering? couldn't you be littering? couldn't she be littering? couldn't we be littering? couldn't you be littering? couldn't they be littering?
Perfeito
couldn't I have littered? couldn't you have littered? couldn't she have littered? couldn't we have littered? couldn't you have littered? couldn't they have littered?
Perfeito com V-ing
couldn't I have been littering? couldn't you have been littering? couldn't she have been littering? couldn't we have been littering? couldn't you have been littering? couldn't they have been littering?