I can follow you can follow he can follow we can follow you can follow they can follow
Forma com V-ing
I can be following you can be following he can be following we can be following you can be following they can be following
Perfeito
I can have followed you can have followed he can have followed we can have followed you can have followed they can have followed
Perfeito com V-ing
I can have been following you can have been following he can have been following we can have been following you can have been following they can have been following
Negação
Forma simple
I can't follow you can't follow he can't follow we can't follow you can't follow they can't follow
Forma com V-ing
I can't be following you can't be following he can't be following we can't be following you can't be following they can't be following
Perfeito
I can't have followed you can't have followed he can't have followed we can't have followed you can't have followed they can't have followed
Perfeito com V-ing
I can't have been following you can't have been following he can't have been following we can't have been following you can't have been following they can't have been following
Forma interrogativa
Forma simple
can I follow? can you follow? can he follow? can we follow? can you follow? can they follow?
Forma com V-ing
can I be following? can you be following? can he be following? can we be following? can you be following? can they be following?
Perfeito
can I have followed? can you have followed? can he have followed? can we have followed? can you have followed? can they have followed?
Perfeito com V-ing
can I have been following? can you have been following? can he have been following? can we have been following? can you have been following? can they have been following?
Forma interro-Negação
Forma simple
can't I follow? can't you follow? can't he follow? can't we follow? can't you follow? can't they follow?
Forma com V-ing
can't I be following? can't you be following? can't he be following? can't we be following? can't you be following? can't they be following?
Perfeito
can't I have followed? can't you have followed? can't he have followed? can't we have followed? can't you have followed? can't they have followed?
Perfeito com V-ing
can't I have been following? can't you have been following? can't he have been following? can't we have been following? can't you have been following? can't they have been following?