English verb conjugation
MUST ICE-SKATE

Regular verb: ice-skate - ice-skated - ice-skated

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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