could antique
Regular verb: antique - antiqued- antiqued

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could antique
you could antique
he could antique
we could antique
you could antique
they could antique 	I could be antiquing
you could be antiquing
he could be antiquing
we could be antiquing
you could be antiquing
they could be antiquing	I could have antiqued
you could have antiqued
he could have antiqued
we could have antiqued
you could have antiqued
they could have antiqued	I could have been antiquing
you could have been antiquing
he could have been antiquing
we could have been antiquing
you could have been antiquing
they could have been antiquing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't antique
you couldn't antique
he couldn't antique
we couldn't antique
you couldn't antique
they couldn't antique 	I couldn't be antiquing
you couldn't be antiquing
he couldn't be antiquing
we couldn't be antiquing
you couldn't be antiquing
they couldn't be antiquing	I couldn't have antiqued
you couldn't have antiqued
he couldn't have antiqued
we couldn't have antiqued
you couldn't have antiqued
they couldn't have antiqued	I couldn't have been antiquing
you couldn't have been antiquing
he couldn't have been antiquing
we couldn't have been antiquing
you couldn't have been antiquing
they couldn't have been antiquing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I antique?
could you antique?
could he antique?
could we antique?
could you antique?
could they antique? 	could I be antiquing?
could you be antiquing?
could he be antiquing?
could we be antiquing?
could you be antiquing?
could they be antiquing? 	could I have antiqued?
could you have antiqued?
could he have antiqued?
could we have antiqued?
could you have antiqued?
could they have antiqued? 	could I have been antiquing?
could you have been antiquing?
could he have been antiquing?
could we have been antiquing?
could you have been antiquing?
could they have been antiquing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I antique?
couldn't you antique?
couldn't he antique?
couldn't we antique?
couldn't you antique?
couldn't they antique? 	couldn't I be antiquing?
couldn't you be antiquing?
couldn't he be antiquing?
couldn't we be antiquing?
couldn't you be antiquing?
couldn't they be antiquing? 	couldn't I have antiqued?
couldn't you have antiqued?
couldn't he have antiqued?
couldn't we have antiqued?
couldn't you have antiqued?
couldn't they have antiqued? 	couldn't I have been antiquing?
couldn't you have been antiquing?
couldn't he have been antiquing?
couldn't we have been antiquing?
couldn't you have been antiquing?
couldn't they have been antiquing?