must smile
Verbo regular: smile - smiled- smiled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must smile
you must smile
he must smile
we must smile
you must smile
they must smile 	I must be smiling
you must be smiling
he must be smiling
we must be smiling
you must be smiling
they must be smiling	I must have smiled
you must have smiled
he must have smiled
we must have smiled
you must have smiled
they must have smiled	I must have been smiling
you must have been smiling
he must have been smiling
we must have been smiling
you must have been smiling
they must have been smiling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't smile
you mustn't smile
he mustn't smile
we mustn't smile
you mustn't smile
they mustn't smile 	I mustn't be smiling
you mustn't be smiling
he mustn't be smiling
we mustn't be smiling
you mustn't be smiling
they mustn't be smiling	I mustn't have smiled
you mustn't have smiled
he mustn't have smiled
we mustn't have smiled
you mustn't have smiled
they mustn't have smiled	I mustn't have been smiling
you mustn't have been smiling
he mustn't have been smiling
we mustn't have been smiling
you mustn't have been smiling
they mustn't have been smiling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I smile?
must you smile?
must he smile?
must we smile?
must you smile?
must they smile? 	must I be smiling?
must you be smiling?
must he be smiling?
must we be smiling?
must you be smiling?
must they be smiling? 	must I have smiled?
must you have smiled?
must he have smiled?
must we have smiled?
must you have smiled?
must they have smiled? 	must I have been smiling?
must you have been smiling?
must he have been smiling?
must we have been smiling?
must you have been smiling?
must they have been smiling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I smile?
mustn't you smile?
mustn't he smile?
mustn't we smile?
mustn't you smile?
mustn't they smile? 	mustn't I be smiling?
mustn't you be smiling?
mustn't he be smiling?
mustn't we be smiling?
mustn't you be smiling?
mustn't they be smiling? 	mustn't I have smiled?
mustn't you have smiled?
mustn't he have smiled?
mustn't we have smiled?
mustn't you have smiled?
mustn't they have smiled? 	mustn't I have been smiling?
mustn't you have been smiling?
mustn't he have been smiling?
mustn't we have been smiling?
mustn't you have been smiling?
mustn't they have been smiling?