English verb conjugation
COULD HAVOC

Regular verb: havoc - havoced - havoced

Affirmation

Simple form	V-ing form
I could havoc you could havoc she could havoc we could havoc you could havoc they could havoc	I could be havocing you could be havocing she could be havocing we could be havocing you could be havocing they could be havocing
Perfect	V-ing perfect
I could have havoced you could have havoced she could have havoced we could have havoced you could have havoced they could have havoced	I could have been havocing you could have been havocing she could have been havocing we could have been havocing you could have been havocing they could have been havocing

Negation

Simple form	V-ing form
I could not havoc you could not havoc she could not havoc we could not havoc you could not havoc they could not havoc	I could not be havocing you could not be havocing she could not be havocing we could not be havocing you could not be havocing they could not be havocing
Perfect	V-ing perfect
I could not have havoced you could not have havoced she could not have havoced we could not have havoced you could not have havoced they could not have havoced	I could not have been havocing you could not have been havocing she could not have been havocing we could not have been havocing you could not have been havocing they could not have been havocing

Interrogative form

Simple form	V-ing form
could I havoc? could you havoc? could she havoc? could we havoc? could you havoc? could they havoc?	could I be havocing? could you be havocing? could she be havocing? could we be havocing? could you be havocing? could they be havocing?
Perfect	V-ing perfect
could I have havoced? could you have havoced? could she have havoced? could we have havoced? could you have havoced? could they have havoced?	could I have been havocing? could you have been havocing? could she have been havocing? could we have been havocing? could you have been havocing? could they have been havocing?

Interro-negative form

Simple form	V-ing form
could I not havoc? could you not havoc? could she not havoc? could we not havoc? could you not havoc? could they not havoc?	could I not be havocing? could you not be havocing? could she not be havocing? could we not be havocing? could you not be havocing? could they not be havocing?
Perfect	V-ing perfect
could I not have havoced? could you not have havoced? could she not have havoced? could we not have havoced? could you not have havoced? could they not have havoced?	could I not have been havocing? could you not have been havocing? could she not have been havocing? could we not have been havocing? could you not have been havocing? could they not have been havocing?