English verb conjugation
COULD PREPLAN

Regular verb: preplan - preplaned - preplaned

Affirmation

Simple form	V-ing form
I could preplan you could preplan she could preplan we could preplan you could preplan they could preplan	I could be preplaning you could be preplaning she could be preplaning we could be preplaning you could be preplaning they could be preplaning
Perfect	V-ing perfect
I could have preplaned you could have preplaned she could have preplaned we could have preplaned you could have preplaned they could have preplaned	I could have been preplaning you could have been preplaning she could have been preplaning we could have been preplaning you could have been preplaning they could have been preplaning

Negation

Simple form	V-ing form
I couldn't preplan you couldn't preplan she couldn't preplan we couldn't preplan you couldn't preplan they couldn't preplan	I couldn't be preplaning you couldn't be preplaning she couldn't be preplaning we couldn't be preplaning you couldn't be preplaning they couldn't be preplaning
Perfect	V-ing perfect
I couldn't have preplaned you couldn't have preplaned she couldn't have preplaned we couldn't have preplaned you couldn't have preplaned they couldn't have preplaned	I couldn't have been preplaning you couldn't have been preplaning she couldn't have been preplaning we couldn't have been preplaning you couldn't have been preplaning they couldn't have been preplaning

Interrogative form

Simple form	V-ing form
could I preplan? could you preplan? could she preplan? could we preplan? could you preplan? could they preplan?	could I be preplaning? could you be preplaning? could she be preplaning? could we be preplaning? could you be preplaning? could they be preplaning?
Perfect	V-ing perfect
could I have preplaned? could you have preplaned? could she have preplaned? could we have preplaned? could you have preplaned? could they have preplaned?	could I have been preplaning? could you have been preplaning? could she have been preplaning? could we have been preplaning? could you have been preplaning? could they have been preplaning?

Interro-negative form

Simple form	V-ing form
couldn't I preplan? couldn't you preplan? couldn't she preplan? couldn't we preplan? couldn't you preplan? couldn't they preplan?	couldn't I be preplaning? couldn't you be preplaning? couldn't she be preplaning? couldn't we be preplaning? couldn't you be preplaning? couldn't they be preplaning?
Perfect	V-ing perfect
couldn't I have preplaned? couldn't you have preplaned? couldn't she have preplaned? couldn't we have preplaned? couldn't you have preplaned? couldn't they have preplaned?	couldn't I have been preplaning? couldn't you have been preplaning? couldn't she have been preplaning? couldn't we have been preplaning? couldn't you have been preplaning? couldn't they have been preplaning?