I can focus you can focus he can focus we can focus you can focus they can focus
Forma con V-ing
I can be focusing you can be focusing he can be focusing we can be focusing you can be focusing they can be focusing
Perfecto
I can have focused you can have focused he can have focused we can have focused you can have focused they can have focused
Perfecto con V-ing
I can have been focusing you can have been focusing he can have been focusing we can have been focusing you can have been focusing they can have been focusing
Negación
Forma simple
I can't focus you can't focus he can't focus we can't focus you can't focus they can't focus
Forma con V-ing
I can't be focusing you can't be focusing he can't be focusing we can't be focusing you can't be focusing they can't be focusing
Perfecto
I can't have focused you can't have focused he can't have focused we can't have focused you can't have focused they can't have focused
Perfecto con V-ing
I can't have been focusing you can't have been focusing he can't have been focusing we can't have been focusing you can't have been focusing they can't have been focusing
Forma interrogativa
Forma simple
can I focus? can you focus? can he focus? can we focus? can you focus? can they focus?
Forma con V-ing
can I be focusing? can you be focusing? can he be focusing? can we be focusing? can you be focusing? can they be focusing?
Perfecto
can I have focused? can you have focused? can he have focused? can we have focused? can you have focused? can they have focused?
Perfecto con V-ing
can I have been focusing? can you have been focusing? can he have been focusing? can we have been focusing? can you have been focusing? can they have been focusing?
Forma interro-negativa
Forma simple
can't I focus? can't you focus? can't he focus? can't we focus? can't you focus? can't they focus?
Forma con V-ing
can't I be focusing? can't you be focusing? can't he be focusing? can't we be focusing? can't you be focusing? can't they be focusing?
Perfecto
can't I have focused? can't you have focused? can't he have focused? can't we have focused? can't you have focused? can't they have focused?
Perfecto con V-ing
can't I have been focusing? can't you have been focusing? can't he have been focusing? can't we have been focusing? can't you have been focusing? can't they have been focusing?