English verb conjugation
CAN FENCE

Regular verb: fence - fenced - fenced

Affirmation

Simple form	V-ing form
I can fence you can fence he can fence we can fence you can fence they can fence	I can be fencing you can be fencing he can be fencing we can be fencing you can be fencing they can be fencing
Perfect	V-ing perfect
I can have fenced you can have fenced he can have fenced we can have fenced you can have fenced they can have fenced	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

Negation

Simple form	V-ing form
I can't fence you can't fence he can't fence we can't fence you can't fence they can't fence	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
Perfect	V-ing perfect
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	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

Interrogative form

Simple form	V-ing form
can I fence? can you fence? can he fence? can we fence? can you fence? can they fence?	can I be fencing? can you be fencing? can he be fencing? can we be fencing? can you be fencing? can they be fencing?
Perfect	V-ing perfect
can I have fenced? can you have fenced? can he have fenced? can we have fenced? can you have fenced? can they have fenced?	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?

Interro-negative form

Simple form	V-ing form
can't I fence? can't you fence? can't he fence? can't we fence? can't you fence? can't they fence?	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?
Perfect	V-ing perfect
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?	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?