must stud
Verbo regular: stud - studded- studded

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must stud
you must stud
she must stud
we must stud
you must stud
they must stud 	I must be studding
you must be studding
she must be studding
we must be studding
you must be studding
they must be studding	I must have studded
you must have studded
she must have studded
we must have studded
you must have studded
they must have studded	I must have been studding
you must have been studding
she must have been studding
we must have been studding
you must have been studding
they must have been studding	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not stud
you must not stud
she must not stud
we must not stud
you must not stud
they must not stud 	I must not be studding
you must not be studding
she must not be studding
we must not be studding
you must not be studding
they must not be studding	I must not have studded
you must not have studded
she must not have studded
we must not have studded
you must not have studded
they must not have studded	I must not have been studding
you must not have been studding
she must not have been studding
we must not have been studding
you must not have been studding
they must not have been studding	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I stud?
must you stud?
must she stud?
must we stud?
must you stud?
must they stud? 	must I be studding?
must you be studding?
must she be studding?
must we be studding?
must you be studding?
must they be studding? 	must I have studded?
must you have studded?
must she have studded?
must we have studded?
must you have studded?
must they have studded? 	must I have been studding?
must you have been studding?
must she have been studding?
must we have been studding?
must you have been studding?
must they have been studding? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not stud?
must you not stud?
must she not stud?
must we not stud?
must you not stud?
must they not stud? 	must I not be studding?
must you not be studding?
must she not be studding?
must we not be studding?
must you not be studding?
must they not be studding? 	must I not have studded?
must you not have studded?
must she not have studded?
must we not have studded?
must you not have studded?
must they not have studded? 	must I not have been studding?
must you not have been studding?
must she not have been studding?
must we not have been studding?
must you not have been studding?
must they not have been studding?