I can fence you can fence he can fence we can fence you can fence they can fence
Forma con V-ing
I can be fencing you can be fencing he can be fencing we can be fencing you can be fencing they can be fencing
Perfecto
I can have fenced you can have fenced he can have fenced we can have fenced you can have fenced they can have fenced
Perfecto con V-ing
I can have been fencing you can have been fencing he can have been fencing we can have been fencing you can have been fencing they can have been fencing
Negación
Forma simple
I can't fence you can't fence he can't fence we can't fence you can't fence they can't fence
Forma con V-ing
I can't be fencing you can't be fencing he can't be fencing we can't be fencing you can't be fencing they can't be fencing
Perfecto
I can't have fenced you can't have fenced he can't have fenced we can't have fenced you can't have fenced they can't have fenced
Perfecto con V-ing
I can't have been fencing you can't have been fencing he can't have been fencing we can't have been fencing you can't have been fencing they can't have been fencing
Forma interrogativa
Forma simple
can I fence? can you fence? can he fence? can we fence? can you fence? can they fence?
Forma con V-ing
can I be fencing? can you be fencing? can he be fencing? can we be fencing? can you be fencing? can they be fencing?
Perfecto
can I have fenced? can you have fenced? can he have fenced? can we have fenced? can you have fenced? can they have fenced?
Perfecto con V-ing
can I have been fencing? can you have been fencing? can he have been fencing? can we have been fencing? can you have been fencing? can they have been fencing?
Forma interro-negativa
Forma simple
can't I fence? can't you fence? can't he fence? can't we fence? can't you fence? can't they fence?
Forma con V-ing
can't I be fencing? can't you be fencing? can't he be fencing? can't we be fencing? can't you be fencing? can't they be fencing?
Perfecto
can't I have fenced? can't you have fenced? can't he have fenced? can't we have fenced? can't you have fenced? can't they have fenced?
Perfecto con V-ing
can't I have been fencing? can't you have been fencing? can't he have been fencing? can't we have been fencing? can't you have been fencing? can't they have been fencing?