could taboo
Regular verb: taboo - tabooed- tabooed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could taboo
you could taboo
she could taboo
we could taboo
you could taboo
they could taboo 	I could be tabooing
you could be tabooing
she could be tabooing
we could be tabooing
you could be tabooing
they could be tabooing	I could have tabooed
you could have tabooed
she could have tabooed
we could have tabooed
you could have tabooed
they could have tabooed	I could have been tabooing
you could have been tabooing
she could have been tabooing
we could have been tabooing
you could have been tabooing
they could have been tabooing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't taboo
you couldn't taboo
she couldn't taboo
we couldn't taboo
you couldn't taboo
they couldn't taboo 	I couldn't be tabooing
you couldn't be tabooing
she couldn't be tabooing
we couldn't be tabooing
you couldn't be tabooing
they couldn't be tabooing	I couldn't have tabooed
you couldn't have tabooed
she couldn't have tabooed
we couldn't have tabooed
you couldn't have tabooed
they couldn't have tabooed	I couldn't have been tabooing
you couldn't have been tabooing
she couldn't have been tabooing
we couldn't have been tabooing
you couldn't have been tabooing
they couldn't have been tabooing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I taboo?
could you taboo?
could she taboo?
could we taboo?
could you taboo?
could they taboo? 	could I be tabooing?
could you be tabooing?
could she be tabooing?
could we be tabooing?
could you be tabooing?
could they be tabooing? 	could I have tabooed?
could you have tabooed?
could she have tabooed?
could we have tabooed?
could you have tabooed?
could they have tabooed? 	could I have been tabooing?
could you have been tabooing?
could she have been tabooing?
could we have been tabooing?
could you have been tabooing?
could they have been tabooing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I taboo?
couldn't you taboo?
couldn't she taboo?
couldn't we taboo?
couldn't you taboo?
couldn't they taboo? 	couldn't I be tabooing?
couldn't you be tabooing?
couldn't she be tabooing?
couldn't we be tabooing?
couldn't you be tabooing?
couldn't they be tabooing? 	couldn't I have tabooed?
couldn't you have tabooed?
couldn't she have tabooed?
couldn't we have tabooed?
couldn't you have tabooed?
couldn't they have tabooed? 	couldn't I have been tabooing?
couldn't you have been tabooing?
couldn't she have been tabooing?
couldn't we have been tabooing?
couldn't you have been tabooing?
couldn't they have been tabooing?