must thumb
Verbo regular: thumb - thumbed- thumbed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must thumb
you must thumb
he must thumb
we must thumb
you must thumb
they must thumb 	I must be thumbing
you must be thumbing
he must be thumbing
we must be thumbing
you must be thumbing
they must be thumbing	I must have thumbed
you must have thumbed
he must have thumbed
we must have thumbed
you must have thumbed
they must have thumbed	I must have been thumbing
you must have been thumbing
he must have been thumbing
we must have been thumbing
you must have been thumbing
they must have been thumbing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't thumb
you mustn't thumb
he mustn't thumb
we mustn't thumb
you mustn't thumb
they mustn't thumb 	I mustn't be thumbing
you mustn't be thumbing
he mustn't be thumbing
we mustn't be thumbing
you mustn't be thumbing
they mustn't be thumbing	I mustn't have thumbed
you mustn't have thumbed
he mustn't have thumbed
we mustn't have thumbed
you mustn't have thumbed
they mustn't have thumbed	I mustn't have been thumbing
you mustn't have been thumbing
he mustn't have been thumbing
we mustn't have been thumbing
you mustn't have been thumbing
they mustn't have been thumbing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I thumb?
must you thumb?
must he thumb?
must we thumb?
must you thumb?
must they thumb? 	must I be thumbing?
must you be thumbing?
must he be thumbing?
must we be thumbing?
must you be thumbing?
must they be thumbing? 	must I have thumbed?
must you have thumbed?
must he have thumbed?
must we have thumbed?
must you have thumbed?
must they have thumbed? 	must I have been thumbing?
must you have been thumbing?
must he have been thumbing?
must we have been thumbing?
must you have been thumbing?
must they have been thumbing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I thumb?
mustn't you thumb?
mustn't he thumb?
mustn't we thumb?
mustn't you thumb?
mustn't they thumb? 	mustn't I be thumbing?
mustn't you be thumbing?
mustn't he be thumbing?
mustn't we be thumbing?
mustn't you be thumbing?
mustn't they be thumbing? 	mustn't I have thumbed?
mustn't you have thumbed?
mustn't he have thumbed?
mustn't we have thumbed?
mustn't you have thumbed?
mustn't they have thumbed? 	mustn't I have been thumbing?
mustn't you have been thumbing?
mustn't he have been thumbing?
mustn't we have been thumbing?
mustn't you have been thumbing?
mustn't they have been thumbing?