English verb conjugation
MUST PLANE

Regular verb: plane - planed - planed

Affirmation

Simple form	V-ing form
I must plane you must plane he must plane we must plane you must plane they must plane	I must be planing you must be planing he must be planing we must be planing you must be planing they must be planing
Perfect	V-ing perfect
I must have planed you must have planed he must have planed we must have planed you must have planed they must have planed	I must have been planing you must have been planing he must have been planing we must have been planing you must have been planing they must have been planing

Negation

Simple form	V-ing form
I mustn't plane you mustn't plane he mustn't plane we mustn't plane you mustn't plane they mustn't plane	I mustn't be planing you mustn't be planing he mustn't be planing we mustn't be planing you mustn't be planing they mustn't be planing
Perfect	V-ing perfect
I mustn't have planed you mustn't have planed he mustn't have planed we mustn't have planed you mustn't have planed they mustn't have planed	I mustn't have been planing you mustn't have been planing he mustn't have been planing we mustn't have been planing you mustn't have been planing they mustn't have been planing

Interrogative form

Simple form	V-ing form
must I plane? must you plane? must he plane? must we plane? must you plane? must they plane?	must I be planing? must you be planing? must he be planing? must we be planing? must you be planing? must they be planing?
Perfect	V-ing perfect
must I have planed? must you have planed? must he have planed? must we have planed? must you have planed? must they have planed?	must I have been planing? must you have been planing? must he have been planing? must we have been planing? must you have been planing? must they have been planing?

Interro-negative form

Simple form	V-ing form
mustn't I plane? mustn't you plane? mustn't he plane? mustn't we plane? mustn't you plane? mustn't they plane?	mustn't I be planing? mustn't you be planing? mustn't he be planing? mustn't we be planing? mustn't you be planing? mustn't they be planing?
Perfect	V-ing perfect
mustn't I have planed? mustn't you have planed? mustn't he have planed? mustn't we have planed? mustn't you have planed? mustn't they have planed?	mustn't I have been planing? mustn't you have been planing? mustn't he have been planing? mustn't we have been planing? mustn't you have been planing? mustn't they have been planing?