English verb conjugation
COULD OVERFILL

Regular verb: overfill - overfilled - overfilled

Affirmation

Simple form	V-ing form
I could overfill you could overfill she could overfill we could overfill you could overfill they could overfill	I could be overfilling you could be overfilling she 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 she 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 she 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 couldn't overfill you couldn't overfill she couldn't overfill we couldn't overfill you couldn't overfill they couldn't overfill	I couldn't be overfilling you couldn't be overfilling she couldn't be overfilling we couldn't be overfilling you couldn't be overfilling they couldn't be overfilling
Perfect	V-ing perfect
I couldn't have overfilled you couldn't have overfilled she couldn't have overfilled we couldn't have overfilled you couldn't have overfilled they couldn't have overfilled	I couldn't have been overfilling you couldn't have been overfilling she couldn't have been overfilling we couldn't have been overfilling you couldn't have been overfilling they couldn't have been overfilling

Interrogative form

Simple form	V-ing form
could I overfill? could you overfill? could she overfill? could we overfill? could you overfill? could they overfill?	could I be overfilling? could you be overfilling? could she 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 she 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 she 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
couldn't I overfill? couldn't you overfill? couldn't she overfill? couldn't we overfill? couldn't you overfill? couldn't they overfill?	couldn't I be overfilling? couldn't you be overfilling? couldn't she be overfilling? couldn't we be overfilling? couldn't you be overfilling? couldn't they be overfilling?
Perfect	V-ing perfect
couldn't I have overfilled? couldn't you have overfilled? couldn't she have overfilled? couldn't we have overfilled? couldn't you have overfilled? couldn't they have overfilled?	couldn't I have been overfilling? couldn't you have been overfilling? couldn't she have been overfilling? couldn't we have been overfilling? couldn't you have been overfilling? couldn't they have been overfilling?