can fence
Regular verb: fence - fenced- fenced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can fence
you can fence
she can fence
we can fence
you can fence
they can fence 	I can be fencing
you can be fencing
she can be fencing
we can be fencing
you can be fencing
they can be fencing	I can have fenced
you can have fenced
she 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
she 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 	Perfect 	V-ing perfect 	
I cannot fence
you cannot fence
she cannot fence
we cannot fence
you cannot fence
they cannot fence 	I cannot be fencing
you cannot be fencing
she cannot be fencing
we cannot be fencing
you cannot be fencing
they cannot be fencing	I cannot have fenced
you cannot have fenced
she cannot have fenced
we cannot have fenced
you cannot have fenced
they cannot have fenced	I cannot have been fencing
you cannot have been fencing
she cannot have been fencing
we cannot have been fencing
you cannot have been fencing
they cannot have been fencing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I fence?
can you fence?
can she fence?
can we fence?
can you fence?
can they fence? 	can I be fencing?
can you be fencing?
can she be fencing?
can we be fencing?
can you be fencing?
can they be fencing? 	can I have fenced?
can you have fenced?
can she 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 she 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 	Perfect 	V-ing perfect 	
can I not fence?
can you not fence?
can she not fence?
can we not fence?
can you not fence?
can they not fence? 	can I not be fencing?
can you not be fencing?
can she not be fencing?
can we not be fencing?
can you not be fencing?
can they not be fencing? 	can I not have fenced?
can you not have fenced?
can she not have fenced?
can we not have fenced?
can you not have fenced?
can they not have fenced? 	can I not have been fencing?
can you not have been fencing?
can she not have been fencing?
can we not have been fencing?
can you not have been fencing?
can they not have been fencing?