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 couldn't overplan you couldn't overplan he couldn't overplan we couldn't overplan you couldn't overplan they couldn't overplan	I couldn't be overplaning you couldn't be overplaning he couldn't be overplaning we couldn't be overplaning you couldn't be overplaning they couldn't be overplaning
Perfect	V-ing perfect
I couldn't have overplaned you couldn't have overplaned he couldn't have overplaned we couldn't have overplaned you couldn't have overplaned they couldn't have overplaned	I couldn't have been overplaning you couldn't have been overplaning he couldn't have been overplaning we couldn't have been overplaning you couldn't have been overplaning they couldn't 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
couldn't I overplan? couldn't you overplan? couldn't he overplan? couldn't we overplan? couldn't you overplan? couldn't they overplan?	couldn't I be overplaning? couldn't you be overplaning? couldn't he be overplaning? couldn't we be overplaning? couldn't you be overplaning? couldn't they be overplaning?
Perfect	V-ing perfect
couldn't I have overplaned? couldn't you have overplaned? couldn't he have overplaned? couldn't we have overplaned? couldn't you have overplaned? couldn't they have overplaned?	couldn't I have been overplaning? couldn't you have been overplaning? couldn't he have been overplaning? couldn't we have been overplaning? couldn't you have been overplaning? couldn't they have been overplaning?