English verb conjugation
COULD OVERPLAN

Regular verb: overplan - overplaned - overplaned

Affirmation

Simple form	V-ing form
I could overplan you could overplan he could overplan we could overplan you could overplan they could overplan	I could be overplaning you could be overplaning he could be overplaning we could be overplaning you could be overplaning they could be overplaning
Perfect	V-ing perfect
I could have overplaned you could have overplaned he could have overplaned we could have overplaned you could have overplaned they could have overplaned	I could have been overplaning you could have been overplaning he could have been overplaning we could have been overplaning you could have been overplaning they could have been overplaning

Negation

Simple form	V-ing form
I could not overplan you could not overplan he could not overplan we could not overplan you could not overplan they could not overplan	I could not be overplaning you could not be overplaning he could not be overplaning we could not be overplaning you could not be overplaning they could not be overplaning
Perfect	V-ing perfect
I could not have overplaned you could not have overplaned he could not have overplaned we could not have overplaned you could not have overplaned they could not have overplaned	I could not have been overplaning you could not have been overplaning he could not have been overplaning we could not have been overplaning you could not have been overplaning they could not have been overplaning

Interrogative form

Simple form	V-ing form
could I overplan? could you overplan? could he overplan? could we overplan? could you overplan? could they overplan?	could I be overplaning? could you be overplaning? could he be overplaning? could we be overplaning? could you be overplaning? could they be overplaning?
Perfect	V-ing perfect
could I have overplaned? could you have overplaned? could he have overplaned? could we have overplaned? could you have overplaned? could they have overplaned?	could I have been overplaning? could you have been overplaning? could he have been overplaning? could we have been overplaning? could you have been overplaning? could they have been overplaning?

Interro-negative form

Simple form	V-ing form
could I not overplan? could you not overplan? could he not overplan? could we not overplan? could you not overplan? could they not overplan?	could I not be overplaning? could you not be overplaning? could he not be overplaning? could we not be overplaning? could you not be overplaning? could they not be overplaning?
Perfect	V-ing perfect
could I not have overplaned? could you not have overplaned? could he not have overplaned? could we not have overplaned? could you not have overplaned? could they not have overplaned?	could I not have been overplaning? could you not have been overplaning? could he not have been overplaning? could we not have been overplaning? could you not have been overplaning? could they not have been overplaning?