I can skip you can skip she can skip we can skip you can skip they can skip
V-ing form
I can be skipping you can be skipping she can be skipping we can be skipping you can be skipping they can be skipping
Perfect
I can have skipped you can have skipped she can have skipped we can have skipped you can have skipped they can have skipped
V-ing perfect
I can have been skipping you can have been skipping she can have been skipping we can have been skipping you can have been skipping they can have been skipping
Negation
Simple form
I can't skip you can't skip she can't skip we can't skip you can't skip they can't skip
V-ing form
I can't be skipping you can't be skipping she can't be skipping we can't be skipping you can't be skipping they can't be skipping
Perfect
I can't have skipped you can't have skipped she can't have skipped we can't have skipped you can't have skipped they can't have skipped
V-ing perfect
I can't have been skipping you can't have been skipping she can't have been skipping we can't have been skipping you can't have been skipping they can't have been skipping
Interrogative form
Simple form
can I skip? can you skip? can she skip? can we skip? can you skip? can they skip?
V-ing form
can I be skipping? can you be skipping? can she be skipping? can we be skipping? can you be skipping? can they be skipping?
Perfect
can I have skipped? can you have skipped? can she have skipped? can we have skipped? can you have skipped? can they have skipped?
V-ing perfect
can I have been skipping? can you have been skipping? can she have been skipping? can we have been skipping? can you have been skipping? can they have been skipping?
Interro-negative form
Simple form
can't I skip? can't you skip? can't she skip? can't we skip? can't you skip? can't they skip?
V-ing form
can't I be skipping? can't you be skipping? can't she be skipping? can't we be skipping? can't you be skipping? can't they be skipping?
Perfect
can't I have skipped? can't you have skipped? can't she have skipped? can't we have skipped? can't you have skipped? can't they have skipped?
V-ing perfect
can't I have been skipping? can't you have been skipping? can't she have been skipping? can't we have been skipping? can't you have been skipping? can't they have been skipping?