can tick
Regular verb: tick - ticked- ticked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can tick
you can tick
he can tick
we can tick
you can tick
they can tick 	I can be ticking
you can be ticking
he can be ticking
we can be ticking
you can be ticking
they can be ticking	I can have ticked
you can have ticked
he can have ticked
we can have ticked
you can have ticked
they can have ticked	I can have been ticking
you can have been ticking
he can have been ticking
we can have been ticking
you can have been ticking
they can have been ticking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot tick
you cannot tick
he cannot tick
we cannot tick
you cannot tick
they cannot tick 	I cannot be ticking
you cannot be ticking
he cannot be ticking
we cannot be ticking
you cannot be ticking
they cannot be ticking	I cannot have ticked
you cannot have ticked
he cannot have ticked
we cannot have ticked
you cannot have ticked
they cannot have ticked	I cannot have been ticking
you cannot have been ticking
he cannot have been ticking
we cannot have been ticking
you cannot have been ticking
they cannot have been ticking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I tick?
can you tick?
can he tick?
can we tick?
can you tick?
can they tick? 	can I be ticking?
can you be ticking?
can he be ticking?
can we be ticking?
can you be ticking?
can they be ticking? 	can I have ticked?
can you have ticked?
can he have ticked?
can we have ticked?
can you have ticked?
can they have ticked? 	can I have been ticking?
can you have been ticking?
can he have been ticking?
can we have been ticking?
can you have been ticking?
can they have been ticking? 	

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