English verb conjugation
MUST ROLLER-SKATE

Regular verb: roller-skate - roller-skated - roller-skated

Affirmation

Simple form	V-ing form
I must roller-skate you must roller-skate he must roller-skate we must roller-skate you must roller-skate they must roller-skate	I must be roller-skating you must be roller-skating he must be roller-skating we must be roller-skating you must be roller-skating they must be roller-skating
Perfect	V-ing perfect
I must have roller-skated you must have roller-skated he must have roller-skated we must have roller-skated you must have roller-skated they must have roller-skated	I must have been roller-skating you must have been roller-skating he must have been roller-skating we must have been roller-skating you must have been roller-skating they must have been roller-skating

Negation

Simple form	V-ing form
I must not roller-skate you must not roller-skate he must not roller-skate we must not roller-skate you must not roller-skate they must not roller-skate	I must not be roller-skating you must not be roller-skating he must not be roller-skating we must not be roller-skating you must not be roller-skating they must not be roller-skating
Perfect	V-ing perfect
I must not have roller-skated you must not have roller-skated he must not have roller-skated we must not have roller-skated you must not have roller-skated they must not have roller-skated	I must not have been roller-skating you must not have been roller-skating he must not have been roller-skating we must not have been roller-skating you must not have been roller-skating they must not have been roller-skating

Interrogative form

Simple form	V-ing form
must I roller-skate? must you roller-skate? must he roller-skate? must we roller-skate? must you roller-skate? must they roller-skate?	must I be roller-skating? must you be roller-skating? must he be roller-skating? must we be roller-skating? must you be roller-skating? must they be roller-skating?
Perfect	V-ing perfect
must I have roller-skated? must you have roller-skated? must he have roller-skated? must we have roller-skated? must you have roller-skated? must they have roller-skated?	must I have been roller-skating? must you have been roller-skating? must he have been roller-skating? must we have been roller-skating? must you have been roller-skating? must they have been roller-skating?

Interro-negative form

Simple form	V-ing form
must I not roller-skate? must you not roller-skate? must he not roller-skate? must we not roller-skate? must you not roller-skate? must they not roller-skate?	must I not be roller-skating? must you not be roller-skating? must he not be roller-skating? must we not be roller-skating? must you not be roller-skating? must they not be roller-skating?
Perfect	V-ing perfect
must I not have roller-skated? must you not have roller-skated? must he not have roller-skated? must we not have roller-skated? must you not have roller-skated? must they not have roller-skated?	must I not have been roller-skating? must you not have been roller-skating? must he not have been roller-skating? must we not have been roller-skating? must you not have been roller-skating? must they not have been roller-skating?