must curb
Verbo regular: curb - curbed- curbed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must curb
you must curb
he must curb
we must curb
you must curb
they must curb 	I must be curbing
you must be curbing
he must be curbing
we must be curbing
you must be curbing
they must be curbing	I must have curbed
you must have curbed
he must have curbed
we must have curbed
you must have curbed
they must have curbed	I must have been curbing
you must have been curbing
he must have been curbing
we must have been curbing
you must have been curbing
they must have been curbing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't curb
you mustn't curb
he mustn't curb
we mustn't curb
you mustn't curb
they mustn't curb 	I mustn't be curbing
you mustn't be curbing
he mustn't be curbing
we mustn't be curbing
you mustn't be curbing
they mustn't be curbing	I mustn't have curbed
you mustn't have curbed
he mustn't have curbed
we mustn't have curbed
you mustn't have curbed
they mustn't have curbed	I mustn't have been curbing
you mustn't have been curbing
he mustn't have been curbing
we mustn't have been curbing
you mustn't have been curbing
they mustn't have been curbing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I curb?
must you curb?
must he curb?
must we curb?
must you curb?
must they curb? 	must I be curbing?
must you be curbing?
must he be curbing?
must we be curbing?
must you be curbing?
must they be curbing? 	must I have curbed?
must you have curbed?
must he have curbed?
must we have curbed?
must you have curbed?
must they have curbed? 	must I have been curbing?
must you have been curbing?
must he have been curbing?
must we have been curbing?
must you have been curbing?
must they have been curbing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I curb?
mustn't you curb?
mustn't he curb?
mustn't we curb?
mustn't you curb?
mustn't they curb? 	mustn't I be curbing?
mustn't you be curbing?
mustn't he be curbing?
mustn't we be curbing?
mustn't you be curbing?
mustn't they be curbing? 	mustn't I have curbed?
mustn't you have curbed?
mustn't he have curbed?
mustn't we have curbed?
mustn't you have curbed?
mustn't they have curbed? 	mustn't I have been curbing?
mustn't you have been curbing?
mustn't he have been curbing?
mustn't we have been curbing?
mustn't you have been curbing?
mustn't they have been curbing?