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