English verb conjugation
MUST ROIL

Regular verb: roil - roiled - roiled

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?