must suffocate
Verbo regular: suffocate - suffocated- suffocated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must suffocate
you must suffocate
she must suffocate
we must suffocate
you must suffocate
they must suffocate 	I must be suffocating
you must be suffocating
she must be suffocating
we must be suffocating
you must be suffocating
they must be suffocating	I must have suffocated
you must have suffocated
she must have suffocated
we must have suffocated
you must have suffocated
they must have suffocated	I must have been suffocating
you must have been suffocating
she must have been suffocating
we must have been suffocating
you must have been suffocating
they must have been suffocating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not suffocate
you must not suffocate
she must not suffocate
we must not suffocate
you must not suffocate
they must not suffocate 	I must not be suffocating
you must not be suffocating
she must not be suffocating
we must not be suffocating
you must not be suffocating
they must not be suffocating	I must not have suffocated
you must not have suffocated
she must not have suffocated
we must not have suffocated
you must not have suffocated
they must not have suffocated	I must not have been suffocating
you must not have been suffocating
she must not have been suffocating
we must not have been suffocating
you must not have been suffocating
they must not have been suffocating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I suffocate?
must you suffocate?
must she suffocate?
must we suffocate?
must you suffocate?
must they suffocate? 	must I be suffocating?
must you be suffocating?
must she be suffocating?
must we be suffocating?
must you be suffocating?
must they be suffocating? 	must I have suffocated?
must you have suffocated?
must she have suffocated?
must we have suffocated?
must you have suffocated?
must they have suffocated? 	must I have been suffocating?
must you have been suffocating?
must she have been suffocating?
must we have been suffocating?
must you have been suffocating?
must they have been suffocating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not suffocate?
must you not suffocate?
must she not suffocate?
must we not suffocate?
must you not suffocate?
must they not suffocate? 	must I not be suffocating?
must you not be suffocating?
must she not be suffocating?
must we not be suffocating?
must you not be suffocating?
must they not be suffocating? 	must I not have suffocated?
must you not have suffocated?
must she not have suffocated?
must we not have suffocated?
must you not have suffocated?
must they not have suffocated? 	must I not have been suffocating?
must you not have been suffocating?
must she not have been suffocating?
must we not have been suffocating?
must you not have been suffocating?
must they not have been suffocating?