English verb conjugation
COULD TANGO

Regular verb: tango - tangoed - tangoed

Affirmation

Simple form	V-ing form
I could tango you could tango she could tango we could tango you could tango they could tango	I could be tangoing you could be tangoing she could be tangoing we could be tangoing you could be tangoing they could be tangoing
Perfect	V-ing perfect
I could have tangoed you could have tangoed she could have tangoed we could have tangoed you could have tangoed they could have tangoed	I could have been tangoing you could have been tangoing she could have been tangoing we could have been tangoing you could have been tangoing they could have been tangoing

Negation

Simple form	V-ing form
I could not tango you could not tango she could not tango we could not tango you could not tango they could not tango	I could not be tangoing you could not be tangoing she could not be tangoing we could not be tangoing you could not be tangoing they could not be tangoing
Perfect	V-ing perfect
I could not have tangoed you could not have tangoed she could not have tangoed we could not have tangoed you could not have tangoed they could not have tangoed	I could not have been tangoing you could not have been tangoing she could not have been tangoing we could not have been tangoing you could not have been tangoing they could not have been tangoing

Interrogative form

Simple form	V-ing form
could I tango? could you tango? could she tango? could we tango? could you tango? could they tango?	could I be tangoing? could you be tangoing? could she be tangoing? could we be tangoing? could you be tangoing? could they be tangoing?
Perfect	V-ing perfect
could I have tangoed? could you have tangoed? could she have tangoed? could we have tangoed? could you have tangoed? could they have tangoed?	could I have been tangoing? could you have been tangoing? could she have been tangoing? could we have been tangoing? could you have been tangoing? could they have been tangoing?

Interro-negative form

Simple form	V-ing form
could I not tango? could you not tango? could she not tango? could we not tango? could you not tango? could they not tango?	could I not be tangoing? could you not be tangoing? could she not be tangoing? could we not be tangoing? could you not be tangoing? could they not be tangoing?
Perfect	V-ing perfect
could I not have tangoed? could you not have tangoed? could she not have tangoed? could we not have tangoed? could you not have tangoed? could they not have tangoed?	could I not have been tangoing? could you not have been tangoing? could she not have been tangoing? could we not have been tangoing? could you not have been tangoing? could they not have been tangoing?