I can tick you can tick she can tick we can tick you can tick they can tick
V-ing form
I can be ticking you can be ticking she can be ticking we can be ticking you can be ticking they can be ticking
Perfect
I can have ticked you can have ticked she can have ticked we can have ticked you can have ticked they can have ticked
V-ing perfect
I can have been ticking you can have been ticking she can have been ticking we can have been ticking you can have been ticking they can have been ticking
Negation
Simple form
I cannot tick you cannot tick she cannot tick we cannot tick you cannot tick they cannot tick
V-ing form
I cannot be ticking you cannot be ticking she cannot be ticking we cannot be ticking you cannot be ticking they cannot be ticking
Perfect
I cannot have ticked you cannot have ticked she cannot have ticked we cannot have ticked you cannot have ticked they cannot have ticked
V-ing perfect
I cannot have been ticking you cannot have been ticking she cannot have been ticking we cannot have been ticking you cannot have been ticking they cannot have been ticking
Interrogative form
Simple form
can I tick? can you tick? can she tick? can we tick? can you tick? can they tick?
V-ing form
can I be ticking? can you be ticking? can she be ticking? can we be ticking? can you be ticking? can they be ticking?
Perfect
can I have ticked? can you have ticked? can she have ticked? can we have ticked? can you have ticked? can they have ticked?
V-ing perfect
can I have been ticking? can you have been ticking? can she have been ticking? can we have been ticking? can you have been ticking? can they have been ticking?
Interro-negative form
Simple form
can I not tick? can you not tick? can she not tick? can we not tick? can you not tick? can they not tick?
V-ing form
can I not be ticking? can you not be ticking? can she not be ticking? can we not be ticking? can you not be ticking? can they not be ticking?
Perfect
can I not have ticked? can you not have ticked? can she not have ticked? can we not have ticked? can you not have ticked? can they not have ticked?
V-ing perfect
can I not have been ticking? can you not have been ticking? can she not have been ticking? can we not have been ticking? can you not have been ticking? can they not have been ticking?