English verb conjugation
COULD EMPOISON

Regular verb: empoison - empoisoned - empoisoned

Affirmation

Simple form	V-ing form
I could empoison you could empoison he could empoison we could empoison you could empoison they could empoison	I could be empoisoning you could be empoisoning he could be empoisoning we could be empoisoning you could be empoisoning they could be empoisoning
Perfect	V-ing perfect
I could have empoisoned you could have empoisoned he could have empoisoned we could have empoisoned you could have empoisoned they could have empoisoned	I could have been empoisoning you could have been empoisoning he could have been empoisoning we could have been empoisoning you could have been empoisoning they could have been empoisoning

Negation

Simple form	V-ing form
I couldn't empoison you couldn't empoison he couldn't empoison we couldn't empoison you couldn't empoison they couldn't empoison	I couldn't be empoisoning you couldn't be empoisoning he couldn't be empoisoning we couldn't be empoisoning you couldn't be empoisoning they couldn't be empoisoning
Perfect	V-ing perfect
I couldn't have empoisoned you couldn't have empoisoned he couldn't have empoisoned we couldn't have empoisoned you couldn't have empoisoned they couldn't have empoisoned	I couldn't have been empoisoning you couldn't have been empoisoning he couldn't have been empoisoning we couldn't have been empoisoning you couldn't have been empoisoning they couldn't have been empoisoning

Interrogative form

Simple form	V-ing form
could I empoison? could you empoison? could he empoison? could we empoison? could you empoison? could they empoison?	could I be empoisoning? could you be empoisoning? could he be empoisoning? could we be empoisoning? could you be empoisoning? could they be empoisoning?
Perfect	V-ing perfect
could I have empoisoned? could you have empoisoned? could he have empoisoned? could we have empoisoned? could you have empoisoned? could they have empoisoned?	could I have been empoisoning? could you have been empoisoning? could he have been empoisoning? could we have been empoisoning? could you have been empoisoning? could they have been empoisoning?

Interro-negative form

Simple form	V-ing form
couldn't I empoison? couldn't you empoison? couldn't he empoison? couldn't we empoison? couldn't you empoison? couldn't they empoison?	couldn't I be empoisoning? couldn't you be empoisoning? couldn't he be empoisoning? couldn't we be empoisoning? couldn't you be empoisoning? couldn't they be empoisoning?
Perfect	V-ing perfect
couldn't I have empoisoned? couldn't you have empoisoned? couldn't he have empoisoned? couldn't we have empoisoned? couldn't you have empoisoned? couldn't they have empoisoned?	couldn't I have been empoisoning? couldn't you have been empoisoning? couldn't he have been empoisoning? couldn't we have been empoisoning? couldn't you have been empoisoning? couldn't they have been empoisoning?