must exercise
Verbo regular: exercise - exercised- exercised

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must exercise
you must exercise
he must exercise
we must exercise
you must exercise
they must exercise 	I must be exercising
you must be exercising
he must be exercising
we must be exercising
you must be exercising
they must be exercising	I must have exercised
you must have exercised
he must have exercised
we must have exercised
you must have exercised
they must have exercised	I must have been exercising
you must have been exercising
he must have been exercising
we must have been exercising
you must have been exercising
they must have been exercising	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not exercise
you must not exercise
he must not exercise
we must not exercise
you must not exercise
they must not exercise 	I must not be exercising
you must not be exercising
he must not be exercising
we must not be exercising
you must not be exercising
they must not be exercising	I must not have exercised
you must not have exercised
he must not have exercised
we must not have exercised
you must not have exercised
they must not have exercised	I must not have been exercising
you must not have been exercising
he must not have been exercising
we must not have been exercising
you must not have been exercising
they must not have been exercising	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I exercise?
must you exercise?
must he exercise?
must we exercise?
must you exercise?
must they exercise? 	must I be exercising?
must you be exercising?
must he be exercising?
must we be exercising?
must you be exercising?
must they be exercising? 	must I have exercised?
must you have exercised?
must he have exercised?
must we have exercised?
must you have exercised?
must they have exercised? 	must I have been exercising?
must you have been exercising?
must he have been exercising?
must we have been exercising?
must you have been exercising?
must they have been exercising? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not exercise?
must you not exercise?
must he not exercise?
must we not exercise?
must you not exercise?
must they not exercise? 	must I not be exercising?
must you not be exercising?
must he not be exercising?
must we not be exercising?
must you not be exercising?
must they not be exercising? 	must I not have exercised?
must you not have exercised?
must he not have exercised?
must we not have exercised?
must you not have exercised?
must they not have exercised? 	must I not have been exercising?
must you not have been exercising?
must he not have been exercising?
must we not have been exercising?
must you not have been exercising?
must they not have been exercising?