must approximate
Verbo regular: approximate - approximated- approximated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must approximate
you must approximate
he must approximate
we must approximate
you must approximate
they must approximate 	I must be approximating
you must be approximating
he must be approximating
we must be approximating
you must be approximating
they must be approximating	I must have approximated
you must have approximated
he must have approximated
we must have approximated
you must have approximated
they must have approximated	I must have been approximating
you must have been approximating
he must have been approximating
we must have been approximating
you must have been approximating
they must have been approximating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't approximate
you mustn't approximate
he mustn't approximate
we mustn't approximate
you mustn't approximate
they mustn't approximate 	I mustn't be approximating
you mustn't be approximating
he mustn't be approximating
we mustn't be approximating
you mustn't be approximating
they mustn't be approximating	I mustn't have approximated
you mustn't have approximated
he mustn't have approximated
we mustn't have approximated
you mustn't have approximated
they mustn't have approximated	I mustn't have been approximating
you mustn't have been approximating
he mustn't have been approximating
we mustn't have been approximating
you mustn't have been approximating
they mustn't have been approximating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I approximate?
must you approximate?
must he approximate?
must we approximate?
must you approximate?
must they approximate? 	must I be approximating?
must you be approximating?
must he be approximating?
must we be approximating?
must you be approximating?
must they be approximating? 	must I have approximated?
must you have approximated?
must he have approximated?
must we have approximated?
must you have approximated?
must they have approximated? 	must I have been approximating?
must you have been approximating?
must he have been approximating?
must we have been approximating?
must you have been approximating?
must they have been approximating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I approximate?
mustn't you approximate?
mustn't he approximate?
mustn't we approximate?
mustn't you approximate?
mustn't they approximate? 	mustn't I be approximating?
mustn't you be approximating?
mustn't he be approximating?
mustn't we be approximating?
mustn't you be approximating?
mustn't they be approximating? 	mustn't I have approximated?
mustn't you have approximated?
mustn't he have approximated?
mustn't we have approximated?
mustn't you have approximated?
mustn't they have approximated? 	mustn't I have been approximating?
mustn't you have been approximating?
mustn't he have been approximating?
mustn't we have been approximating?
mustn't you have been approximating?
mustn't they have been approximating?