English verb conjugation
COULD OVERFILL

Regular verb: overfill - overfilled - overfilled

Affirmation

Simple form	V-ing form
I could overfill you could overfill he could overfill we could overfill you could overfill they could overfill	I could be overfilling you could be overfilling he could be overfilling we could be overfilling you could be overfilling they could be overfilling
Perfect	V-ing perfect
I could have overfilled you could have overfilled he could have overfilled we could have overfilled you could have overfilled they could have overfilled	I could have been overfilling you could have been overfilling he could have been overfilling we could have been overfilling you could have been overfilling they could have been overfilling

Negation

Simple form	V-ing form
I could not overfill you could not overfill he could not overfill we could not overfill you could not overfill they could not overfill	I could not be overfilling you could not be overfilling he could not be overfilling we could not be overfilling you could not be overfilling they could not be overfilling
Perfect	V-ing perfect
I could not have overfilled you could not have overfilled he could not have overfilled we could not have overfilled you could not have overfilled they could not have overfilled	I could not have been overfilling you could not have been overfilling he could not have been overfilling we could not have been overfilling you could not have been overfilling they could not have been overfilling

Interrogative form

Simple form	V-ing form
could I overfill? could you overfill? could he overfill? could we overfill? could you overfill? could they overfill?	could I be overfilling? could you be overfilling? could he be overfilling? could we be overfilling? could you be overfilling? could they be overfilling?
Perfect	V-ing perfect
could I have overfilled? could you have overfilled? could he have overfilled? could we have overfilled? could you have overfilled? could they have overfilled?	could I have been overfilling? could you have been overfilling? could he have been overfilling? could we have been overfilling? could you have been overfilling? could they have been overfilling?

Interro-negative form

Simple form	V-ing form
could I not overfill? could you not overfill? could he not overfill? could we not overfill? could you not overfill? could they not overfill?	could I not be overfilling? could you not be overfilling? could he not be overfilling? could we not be overfilling? could you not be overfilling? could they not be overfilling?
Perfect	V-ing perfect
could I not have overfilled? could you not have overfilled? could he not have overfilled? could we not have overfilled? could you not have overfilled? could they not have overfilled?	could I not have been overfilling? could you not have been overfilling? could he not have been overfilling? could we not have been overfilling? could you not have been overfilling? could they not have been overfilling?