must fence
Verbo regular: fence - fenced- fenced

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must fence
you must fence
he must fence
we must fence
you must fence
they must fence 	I must be fencing
you must be fencing
he must be fencing
we must be fencing
you must be fencing
they must be fencing	I must have fenced
you must have fenced
he must have fenced
we must have fenced
you must have fenced
they must have fenced	I must have been fencing
you must have been fencing
he must have been fencing
we must have been fencing
you must have been fencing
they must have been fencing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not fence
you must not fence
he must not fence
we must not fence
you must not fence
they must not fence 	I must not be fencing
you must not be fencing
he must not be fencing
we must not be fencing
you must not be fencing
they must not be fencing	I must not have fenced
you must not have fenced
he must not have fenced
we must not have fenced
you must not have fenced
they must not have fenced	I must not have been fencing
you must not have been fencing
he must not have been fencing
we must not have been fencing
you must not have been fencing
they must not have been fencing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I fence?
must you fence?
must he fence?
must we fence?
must you fence?
must they fence? 	must I be fencing?
must you be fencing?
must he be fencing?
must we be fencing?
must you be fencing?
must they be fencing? 	must I have fenced?
must you have fenced?
must he have fenced?
must we have fenced?
must you have fenced?
must they have fenced? 	must I have been fencing?
must you have been fencing?
must he have been fencing?
must we have been fencing?
must you have been fencing?
must they have been fencing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not fence?
must you not fence?
must he not fence?
must we not fence?
must you not fence?
must they not fence? 	must I not be fencing?
must you not be fencing?
must he not be fencing?
must we not be fencing?
must you not be fencing?
must they not be fencing? 	must I not have fenced?
must you not have fenced?
must he not have fenced?
must we not have fenced?
must you not have fenced?
must they not have fenced? 	must I not have been fencing?
must you not have been fencing?
must he not have been fencing?
must we not have been fencing?
must you not have been fencing?
must they not have been fencing?