can tank
Regular verb: tank - tanked- tanked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can tank
you can tank
he can tank
we can tank
you can tank
they can tank 	I can be tanking
you can be tanking
he can be tanking
we can be tanking
you can be tanking
they can be tanking	I can have tanked
you can have tanked
he can have tanked
we can have tanked
you can have tanked
they can have tanked	I can have been tanking
you can have been tanking
he can have been tanking
we can have been tanking
you can have been tanking
they can have been tanking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot tank
you cannot tank
he cannot tank
we cannot tank
you cannot tank
they cannot tank 	I cannot be tanking
you cannot be tanking
he cannot be tanking
we cannot be tanking
you cannot be tanking
they cannot be tanking	I cannot have tanked
you cannot have tanked
he cannot have tanked
we cannot have tanked
you cannot have tanked
they cannot have tanked	I cannot have been tanking
you cannot have been tanking
he cannot have been tanking
we cannot have been tanking
you cannot have been tanking
they cannot have been tanking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I tank?
can you tank?
can he tank?
can we tank?
can you tank?
can they tank? 	can I be tanking?
can you be tanking?
can he be tanking?
can we be tanking?
can you be tanking?
can they be tanking? 	can I have tanked?
can you have tanked?
can he have tanked?
can we have tanked?
can you have tanked?
can they have tanked? 	can I have been tanking?
can you have been tanking?
can he have been tanking?
can we have been tanking?
can you have been tanking?
can they have been tanking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not tank?
can you not tank?
can he not tank?
can we not tank?
can you not tank?
can they not tank? 	can I not be tanking?
can you not be tanking?
can he not be tanking?
can we not be tanking?
can you not be tanking?
can they not be tanking? 	can I not have tanked?
can you not have tanked?
can he not have tanked?
can we not have tanked?
can you not have tanked?
can they not have tanked? 	can I not have been tanking?
can you not have been tanking?
can he not have been tanking?
can we not have been tanking?
can you not have been tanking?
can they not have been tanking?