I can litter you can litter he can litter we can litter you can litter they can litter
Forma con V-ing
I can be littering you can be littering he can be littering we can be littering you can be littering they can be littering
Perfecto
I can have littered you can have littered he can have littered we can have littered you can have littered they can have littered
Perfecto con V-ing
I can have been littering you can have been littering he can have been littering we can have been littering you can have been littering they can have been littering
Negación
Forma simple
I can't litter you can't litter he can't litter we can't litter you can't litter they can't litter
Forma con V-ing
I can't be littering you can't be littering he can't be littering we can't be littering you can't be littering they can't be littering
Perfecto
I can't have littered you can't have littered he can't have littered we can't have littered you can't have littered they can't have littered
Perfecto con V-ing
I can't have been littering you can't have been littering he can't have been littering we can't have been littering you can't have been littering they can't have been littering
Forma interrogativa
Forma simple
can I litter? can you litter? can he litter? can we litter? can you litter? can they litter?
Forma con V-ing
can I be littering? can you be littering? can he be littering? can we be littering? can you be littering? can they be littering?
Perfecto
can I have littered? can you have littered? can he have littered? can we have littered? can you have littered? can they have littered?
Perfecto con V-ing
can I have been littering? can you have been littering? can he have been littering? can we have been littering? can you have been littering? can they have been littering?
Forma interro-negativa
Forma simple
can't I litter? can't you litter? can't he litter? can't we litter? can't you litter? can't they litter?
Forma con V-ing
can't I be littering? can't you be littering? can't he be littering? can't we be littering? can't you be littering? can't they be littering?
Perfecto
can't I have littered? can't you have littered? can't he have littered? can't we have littered? can't you have littered? can't they have littered?
Perfecto con V-ing
can't I have been littering? can't you have been littering? can't he have been littering? can't we have been littering? can't you have been littering? can't they have been littering?