English verb conjugation
COULD OUTBOX

Regular verb: outbox - outboxed - outboxed

Affirmation

Simple form	V-ing form
I could outbox you could outbox she could outbox we could outbox you could outbox they could outbox	I could be outboxing you could be outboxing she could be outboxing we could be outboxing you could be outboxing they could be outboxing
Perfect	V-ing perfect
I could have outboxed you could have outboxed she could have outboxed we could have outboxed you could have outboxed they could have outboxed	I could have been outboxing you could have been outboxing she could have been outboxing we could have been outboxing you could have been outboxing they could have been outboxing

Negation

Simple form	V-ing form
I could not outbox you could not outbox she could not outbox we could not outbox you could not outbox they could not outbox	I could not be outboxing you could not be outboxing she could not be outboxing we could not be outboxing you could not be outboxing they could not be outboxing
Perfect	V-ing perfect
I could not have outboxed you could not have outboxed she could not have outboxed we could not have outboxed you could not have outboxed they could not have outboxed	I could not have been outboxing you could not have been outboxing she could not have been outboxing we could not have been outboxing you could not have been outboxing they could not have been outboxing

Interrogative form

Simple form	V-ing form
could I outbox? could you outbox? could she outbox? could we outbox? could you outbox? could they outbox?	could I be outboxing? could you be outboxing? could she be outboxing? could we be outboxing? could you be outboxing? could they be outboxing?
Perfect	V-ing perfect
could I have outboxed? could you have outboxed? could she have outboxed? could we have outboxed? could you have outboxed? could they have outboxed?	could I have been outboxing? could you have been outboxing? could she have been outboxing? could we have been outboxing? could you have been outboxing? could they have been outboxing?

Interro-negative form

Simple form	V-ing form
could I not outbox? could you not outbox? could she not outbox? could we not outbox? could you not outbox? could they not outbox?	could I not be outboxing? could you not be outboxing? could she not be outboxing? could we not be outboxing? could you not be outboxing? could they not be outboxing?
Perfect	V-ing perfect
could I not have outboxed? could you not have outboxed? could she not have outboxed? could we not have outboxed? could you not have outboxed? could they not have outboxed?	could I not have been outboxing? could you not have been outboxing? could she not have been outboxing? could we not have been outboxing? could you not have been outboxing? could they not have been outboxing?