I can ice-skate you can ice-skate she can ice-skate we can ice-skate you can ice-skate they can ice-skate
V-ing form
I can be ice-skating you can be ice-skating she can be ice-skating we can be ice-skating you can be ice-skating they can be ice-skating
Perfect
I can have ice-skated you can have ice-skated she can have ice-skated we can have ice-skated you can have ice-skated they can have ice-skated
V-ing perfect
I can have been ice-skating you can have been ice-skating she 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
I can't ice-skate you can't ice-skate she can't ice-skate we can't ice-skate you can't ice-skate they can't ice-skate
V-ing form
I can't be ice-skating you can't be ice-skating she can't be ice-skating we can't be ice-skating you can't be ice-skating they can't be ice-skating
Perfect
I can't have ice-skated you can't have ice-skated she can't have ice-skated we can't have ice-skated you can't have ice-skated they can't have ice-skated
V-ing perfect
I can't have been ice-skating you can't have been ice-skating she can't have been ice-skating we can't have been ice-skating you can't have been ice-skating they can't have been ice-skating
Interrogative form
Simple form
can I ice-skate? can you ice-skate? can she ice-skate? can we ice-skate? can you ice-skate? can they ice-skate?
V-ing form
can I be ice-skating? can you be ice-skating? can she be ice-skating? can we be ice-skating? can you be ice-skating? can they be ice-skating?
Perfect
can I have ice-skated? can you have ice-skated? can she have ice-skated? can we have ice-skated? can you have ice-skated? can they have ice-skated?
V-ing perfect
can I have been ice-skating? can you have been ice-skating? can she 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
can't I ice-skate? can't you ice-skate? can't she ice-skate? can't we ice-skate? can't you ice-skate? can't they ice-skate?
V-ing form
can't I be ice-skating? can't you be ice-skating? can't she be ice-skating? can't we be ice-skating? can't you be ice-skating? can't they be ice-skating?
Perfect
can't I have ice-skated? can't you have ice-skated? can't she have ice-skated? can't we have ice-skated? can't you have ice-skated? can't they have ice-skated?
V-ing perfect
can't I have been ice-skating? can't you have been ice-skating? can't she have been ice-skating? can't we have been ice-skating? can't you have been ice-skating? can't they have been ice-skating?