must keyboard
Verbo regular: keyboard - keyboarded- keyboarded

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must keyboard
you must keyboard
she must keyboard
we must keyboard
you must keyboard
they must keyboard 	I must be keyboarding
you must be keyboarding
she must be keyboarding
we must be keyboarding
you must be keyboarding
they must be keyboarding	I must have keyboarded
you must have keyboarded
she must have keyboarded
we must have keyboarded
you must have keyboarded
they must have keyboarded	I must have been keyboarding
you must have been keyboarding
she must have been keyboarding
we must have been keyboarding
you must have been keyboarding
they must have been keyboarding	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not keyboard
you must not keyboard
she must not keyboard
we must not keyboard
you must not keyboard
they must not keyboard 	I must not be keyboarding
you must not be keyboarding
she must not be keyboarding
we must not be keyboarding
you must not be keyboarding
they must not be keyboarding	I must not have keyboarded
you must not have keyboarded
she must not have keyboarded
we must not have keyboarded
you must not have keyboarded
they must not have keyboarded	I must not have been keyboarding
you must not have been keyboarding
she must not have been keyboarding
we must not have been keyboarding
you must not have been keyboarding
they must not have been keyboarding	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I keyboard?
must you keyboard?
must she keyboard?
must we keyboard?
must you keyboard?
must they keyboard? 	must I be keyboarding?
must you be keyboarding?
must she be keyboarding?
must we be keyboarding?
must you be keyboarding?
must they be keyboarding? 	must I have keyboarded?
must you have keyboarded?
must she have keyboarded?
must we have keyboarded?
must you have keyboarded?
must they have keyboarded? 	must I have been keyboarding?
must you have been keyboarding?
must she have been keyboarding?
must we have been keyboarding?
must you have been keyboarding?
must they have been keyboarding? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not keyboard?
must you not keyboard?
must she not keyboard?
must we not keyboard?
must you not keyboard?
must they not keyboard? 	must I not be keyboarding?
must you not be keyboarding?
must she not be keyboarding?
must we not be keyboarding?
must you not be keyboarding?
must they not be keyboarding? 	must I not have keyboarded?
must you not have keyboarded?
must she not have keyboarded?
must we not have keyboarded?
must you not have keyboarded?
must they not have keyboarded? 	must I not have been keyboarding?
must you not have been keyboarding?
must she not have been keyboarding?
must we not have been keyboarding?
must you not have been keyboarding?
must they not have been keyboarding?