English verb conjugation
CAN TANK

Regular verb: tank - tanked - tanked

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?