I can classify you can classify he can classify we can classify you can classify they can classify
Forma con V-ing
I can be classifying you can be classifying he can be classifying we can be classifying you can be classifying they can be classifying
Perfecto
I can have classified you can have classified he can have classified we can have classified you can have classified they can have classified
Perfecto con V-ing
I can have been classifying you can have been classifying he can have been classifying we can have been classifying you can have been classifying they can have been classifying
Negación
Forma simple
I can't classify you can't classify he can't classify we can't classify you can't classify they can't classify
Forma con V-ing
I can't be classifying you can't be classifying he can't be classifying we can't be classifying you can't be classifying they can't be classifying
Perfecto
I can't have classified you can't have classified he can't have classified we can't have classified you can't have classified they can't have classified
Perfecto con V-ing
I can't have been classifying you can't have been classifying he can't have been classifying we can't have been classifying you can't have been classifying they can't have been classifying
Forma interrogativa
Forma simple
can I classify? can you classify? can he classify? can we classify? can you classify? can they classify?
Forma con V-ing
can I be classifying? can you be classifying? can he be classifying? can we be classifying? can you be classifying? can they be classifying?
Perfecto
can I have classified? can you have classified? can he have classified? can we have classified? can you have classified? can they have classified?
Perfecto con V-ing
can I have been classifying? can you have been classifying? can he have been classifying? can we have been classifying? can you have been classifying? can they have been classifying?
Forma interro-negativa
Forma simple
can't I classify? can't you classify? can't he classify? can't we classify? can't you classify? can't they classify?
Forma con V-ing
can't I be classifying? can't you be classifying? can't he be classifying? can't we be classifying? can't you be classifying? can't they be classifying?
Perfecto
can't I have classified? can't you have classified? can't he have classified? can't we have classified? can't you have classified? can't they have classified?
Perfecto con V-ing
can't I have been classifying? can't you have been classifying? can't he have been classifying? can't we have been classifying? can't you have been classifying? can't they have been classifying?