must attenuate
Verbo regular: attenuate - attenuated- attenuated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must attenuate
you must attenuate
she must attenuate
we must attenuate
you must attenuate
they must attenuate 	I must be attenuating
you must be attenuating
she must be attenuating
we must be attenuating
you must be attenuating
they must be attenuating	I must have attenuated
you must have attenuated
she must have attenuated
we must have attenuated
you must have attenuated
they must have attenuated	I must have been attenuating
you must have been attenuating
she must have been attenuating
we must have been attenuating
you must have been attenuating
they must have been attenuating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not attenuate
you must not attenuate
she must not attenuate
we must not attenuate
you must not attenuate
they must not attenuate 	I must not be attenuating
you must not be attenuating
she must not be attenuating
we must not be attenuating
you must not be attenuating
they must not be attenuating	I must not have attenuated
you must not have attenuated
she must not have attenuated
we must not have attenuated
you must not have attenuated
they must not have attenuated	I must not have been attenuating
you must not have been attenuating
she must not have been attenuating
we must not have been attenuating
you must not have been attenuating
they must not have been attenuating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I attenuate?
must you attenuate?
must she attenuate?
must we attenuate?
must you attenuate?
must they attenuate? 	must I be attenuating?
must you be attenuating?
must she be attenuating?
must we be attenuating?
must you be attenuating?
must they be attenuating? 	must I have attenuated?
must you have attenuated?
must she have attenuated?
must we have attenuated?
must you have attenuated?
must they have attenuated? 	must I have been attenuating?
must you have been attenuating?
must she have been attenuating?
must we have been attenuating?
must you have been attenuating?
must they have been attenuating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not attenuate?
must you not attenuate?
must she not attenuate?
must we not attenuate?
must you not attenuate?
must they not attenuate? 	must I not be attenuating?
must you not be attenuating?
must she not be attenuating?
must we not be attenuating?
must you not be attenuating?
must they not be attenuating? 	must I not have attenuated?
must you not have attenuated?
must she not have attenuated?
must we not have attenuated?
must you not have attenuated?
must they not have attenuated? 	must I not have been attenuating?
must you not have been attenuating?
must she not have been attenuating?
must we not have been attenuating?
must you not have been attenuating?
must they not have been attenuating?