English verb conjugation
COULD WINTERKILL

Regular verb: winterkill - winterkilled - winterkilled

Affirmation

Simple form	V-ing form
I could winterkill you could winterkill he could winterkill we could winterkill you could winterkill they could winterkill	I could be winterkilling you could be winterkilling he could be winterkilling we could be winterkilling you could be winterkilling they could be winterkilling
Perfect	V-ing perfect
I could have winterkilled you could have winterkilled he could have winterkilled we could have winterkilled you could have winterkilled they could have winterkilled	I could have been winterkilling you could have been winterkilling he could have been winterkilling we could have been winterkilling you could have been winterkilling they could have been winterkilling

Negation

Simple form	V-ing form
I could not winterkill you could not winterkill he could not winterkill we could not winterkill you could not winterkill they could not winterkill	I could not be winterkilling you could not be winterkilling he could not be winterkilling we could not be winterkilling you could not be winterkilling they could not be winterkilling
Perfect	V-ing perfect
I could not have winterkilled you could not have winterkilled he could not have winterkilled we could not have winterkilled you could not have winterkilled they could not have winterkilled	I could not have been winterkilling you could not have been winterkilling he could not have been winterkilling we could not have been winterkilling you could not have been winterkilling they could not have been winterkilling

Interrogative form

Simple form	V-ing form
could I winterkill? could you winterkill? could he winterkill? could we winterkill? could you winterkill? could they winterkill?	could I be winterkilling? could you be winterkilling? could he be winterkilling? could we be winterkilling? could you be winterkilling? could they be winterkilling?
Perfect	V-ing perfect
could I have winterkilled? could you have winterkilled? could he have winterkilled? could we have winterkilled? could you have winterkilled? could they have winterkilled?	could I have been winterkilling? could you have been winterkilling? could he have been winterkilling? could we have been winterkilling? could you have been winterkilling? could they have been winterkilling?

Interro-negative form

Simple form	V-ing form
could I not winterkill? could you not winterkill? could he not winterkill? could we not winterkill? could you not winterkill? could they not winterkill?	could I not be winterkilling? could you not be winterkilling? could he not be winterkilling? could we not be winterkilling? could you not be winterkilling? could they not be winterkilling?
Perfect	V-ing perfect
could I not have winterkilled? could you not have winterkilled? could he not have winterkilled? could we not have winterkilled? could you not have winterkilled? could they not have winterkilled?	could I not have been winterkilling? could you not have been winterkilling? could he not have been winterkilling? could we not have been winterkilling? could you not have been winterkilling? could they not have been winterkilling?