English verb conjugation
MUST PREPLAN

Regular verb: preplan - preplaned - preplaned

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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