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
she must curb
we must curb
you must curb
they must curb 	I must be curbing
you must be curbing
she must be curbing
we must be curbing
you must be curbing
they must be curbing	I must have curbed
you must have curbed
she 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
she 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 must not curb
you must not curb
she must not curb
we must not curb
you must not curb
they must not curb 	I must not be curbing
you must not be curbing
she must not be curbing
we must not be curbing
you must not be curbing
they must not be curbing	I must not have curbed
you must not have curbed
she must not have curbed
we must not have curbed
you must not have curbed
they must not have curbed	I must not have been curbing
you must not have been curbing
she must not have been curbing
we must not have been curbing
you must not have been curbing
they must not have been curbing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I curb?
must you curb?
must she curb?
must we curb?
must you curb?
must they curb? 	must I be curbing?
must you be curbing?
must she be curbing?
must we be curbing?
must you be curbing?
must they be curbing? 	must I have curbed?
must you have curbed?
must she 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 she 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 	
must I not curb?
must you not curb?
must she not curb?
must we not curb?
must you not curb?
must they not curb? 	must I not be curbing?
must you not be curbing?
must she not be curbing?
must we not be curbing?
must you not be curbing?
must they not be curbing? 	must I not have curbed?
must you not have curbed?
must she not have curbed?
must we not have curbed?
must you not have curbed?
must they not have curbed? 	must I not have been curbing?
must you not have been curbing?
must she not have been curbing?
must we not have been curbing?
must you not have been curbing?
must they not have been curbing?