must plan
Verbo regular: plan - planned- planned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must plan
you must plan
she must plan
we must plan
you must plan
they must plan 	I must be planning
you must be planning
she must be planning
we must be planning
you must be planning
they must be planning	I must have planned
you must have planned
she must have planned
we must have planned
you must have planned
they must have planned	I must have been planning
you must have been planning
she must have been planning
we must have been planning
you must have been planning
they must have been planning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't plan
you mustn't plan
she mustn't plan
we mustn't plan
you mustn't plan
they mustn't plan 	I mustn't be planning
you mustn't be planning
she mustn't be planning
we mustn't be planning
you mustn't be planning
they mustn't be planning	I mustn't have planned
you mustn't have planned
she mustn't have planned
we mustn't have planned
you mustn't have planned
they mustn't have planned	I mustn't have been planning
you mustn't have been planning
she mustn't have been planning
we mustn't have been planning
you mustn't have been planning
they mustn't have been planning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I plan?
must you plan?
must she plan?
must we plan?
must you plan?
must they plan? 	must I be planning?
must you be planning?
must she be planning?
must we be planning?
must you be planning?
must they be planning? 	must I have planned?
must you have planned?
must she have planned?
must we have planned?
must you have planned?
must they have planned? 	must I have been planning?
must you have been planning?
must she have been planning?
must we have been planning?
must you have been planning?
must they have been planning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I plan?
mustn't you plan?
mustn't she plan?
mustn't we plan?
mustn't you plan?
mustn't they plan? 	mustn't I be planning?
mustn't you be planning?
mustn't she be planning?
mustn't we be planning?
mustn't you be planning?
mustn't they be planning? 	mustn't I have planned?
mustn't you have planned?
mustn't she have planned?
mustn't we have planned?
mustn't you have planned?
mustn't they have planned? 	mustn't I have been planning?
mustn't you have been planning?
mustn't she have been planning?
mustn't we have been planning?
mustn't you have been planning?
mustn't they have been planning?