could antidote
Regular verb: antidote - antidoted- antidoted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could antidote
you could antidote
he could antidote
we could antidote
you could antidote
they could antidote 	I could be antidoting
you could be antidoting
he could be antidoting
we could be antidoting
you could be antidoting
they could be antidoting	I could have antidoted
you could have antidoted
he could have antidoted
we could have antidoted
you could have antidoted
they could have antidoted	I could have been antidoting
you could have been antidoting
he could have been antidoting
we could have been antidoting
you could have been antidoting
they could have been antidoting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't antidote
you couldn't antidote
he couldn't antidote
we couldn't antidote
you couldn't antidote
they couldn't antidote 	I couldn't be antidoting
you couldn't be antidoting
he couldn't be antidoting
we couldn't be antidoting
you couldn't be antidoting
they couldn't be antidoting	I couldn't have antidoted
you couldn't have antidoted
he couldn't have antidoted
we couldn't have antidoted
you couldn't have antidoted
they couldn't have antidoted	I couldn't have been antidoting
you couldn't have been antidoting
he couldn't have been antidoting
we couldn't have been antidoting
you couldn't have been antidoting
they couldn't have been antidoting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I antidote?
could you antidote?
could he antidote?
could we antidote?
could you antidote?
could they antidote? 	could I be antidoting?
could you be antidoting?
could he be antidoting?
could we be antidoting?
could you be antidoting?
could they be antidoting? 	could I have antidoted?
could you have antidoted?
could he have antidoted?
could we have antidoted?
could you have antidoted?
could they have antidoted? 	could I have been antidoting?
could you have been antidoting?
could he have been antidoting?
could we have been antidoting?
could you have been antidoting?
could they have been antidoting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I antidote?
couldn't you antidote?
couldn't he antidote?
couldn't we antidote?
couldn't you antidote?
couldn't they antidote? 	couldn't I be antidoting?
couldn't you be antidoting?
couldn't he be antidoting?
couldn't we be antidoting?
couldn't you be antidoting?
couldn't they be antidoting? 	couldn't I have antidoted?
couldn't you have antidoted?
couldn't he have antidoted?
couldn't we have antidoted?
couldn't you have antidoted?
couldn't they have antidoted? 	couldn't I have been antidoting?
couldn't you have been antidoting?
couldn't he have been antidoting?
couldn't we have been antidoting?
couldn't you have been antidoting?
couldn't they have been antidoting?