must roil
Verbo regular: roil - roiled- roiled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must roil
you must roil
he must roil
we must roil
you must roil
they must roil 	I must be roiling
you must be roiling
he must be roiling
we must be roiling
you must be roiling
they must be roiling	I must have roiled
you must have roiled
he must have roiled
we must have roiled
you must have roiled
they must have roiled	I must have been roiling
you must have been roiling
he must have been roiling
we must have been roiling
you must have been roiling
they must have been roiling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not roil
you must not roil
he must not roil
we must not roil
you must not roil
they must not roil 	I must not be roiling
you must not be roiling
he must not be roiling
we must not be roiling
you must not be roiling
they must not be roiling	I must not have roiled
you must not have roiled
he must not have roiled
we must not have roiled
you must not have roiled
they must not have roiled	I must not have been roiling
you must not have been roiling
he must not have been roiling
we must not have been roiling
you must not have been roiling
they must not have been roiling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I roil?
must you roil?
must he roil?
must we roil?
must you roil?
must they roil? 	must I be roiling?
must you be roiling?
must he be roiling?
must we be roiling?
must you be roiling?
must they be roiling? 	must I have roiled?
must you have roiled?
must he have roiled?
must we have roiled?
must you have roiled?
must they have roiled? 	must I have been roiling?
must you have been roiling?
must he have been roiling?
must we have been roiling?
must you have been roiling?
must they have been roiling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not roil?
must you not roil?
must he not roil?
must we not roil?
must you not roil?
must they not roil? 	must I not be roiling?
must you not be roiling?
must he not be roiling?
must we not be roiling?
must you not be roiling?
must they not be roiling? 	must I not have roiled?
must you not have roiled?
must he not have roiled?
must we not have roiled?
must you not have roiled?
must they not have roiled? 	must I not have been roiling?
must you not have been roiling?
must he not have been roiling?
must we not have been roiling?
must you not have been roiling?
must they not have been roiling?