English verb conjugation
CAN ICE-SKATE

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

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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