must fence
Verbo regular: fence - fenced- fenced

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't fence
you mustn't fence
he mustn't fence
we mustn't fence
you mustn't fence
they mustn't fence 	I mustn't be fencing
you mustn't be fencing
he mustn't be fencing
we mustn't be fencing
you mustn't be fencing
they mustn't be fencing	I mustn't have fenced
you mustn't have fenced
he mustn't have fenced
we mustn't have fenced
you mustn't have fenced
they mustn't have fenced	I mustn't have been fencing
you mustn't have been fencing
he mustn't have been fencing
we mustn't have been fencing
you mustn't have been fencing
they mustn't have been fencing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I fence?
mustn't you fence?
mustn't he fence?
mustn't we fence?
mustn't you fence?
mustn't they fence? 	mustn't I be fencing?
mustn't you be fencing?
mustn't he be fencing?
mustn't we be fencing?
mustn't you be fencing?
mustn't they be fencing? 	mustn't I have fenced?
mustn't you have fenced?
mustn't he have fenced?
mustn't we have fenced?
mustn't you have fenced?
mustn't they have fenced? 	mustn't I have been fencing?
mustn't you have been fencing?
mustn't he have been fencing?
mustn't we have been fencing?
mustn't you have been fencing?
mustn't they have been fencing?