must lift
Verbo regular: lift - lifted- lifted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must lift
you must lift
she must lift
we must lift
you must lift
they must lift 	I must be lifting
you must be lifting
she must be lifting
we must be lifting
you must be lifting
they must be lifting	I must have lifted
you must have lifted
she must have lifted
we must have lifted
you must have lifted
they must have lifted	I must have been lifting
you must have been lifting
she must have been lifting
we must have been lifting
you must have been lifting
they must have been lifting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't lift
you mustn't lift
she mustn't lift
we mustn't lift
you mustn't lift
they mustn't lift 	I mustn't be lifting
you mustn't be lifting
she mustn't be lifting
we mustn't be lifting
you mustn't be lifting
they mustn't be lifting	I mustn't have lifted
you mustn't have lifted
she mustn't have lifted
we mustn't have lifted
you mustn't have lifted
they mustn't have lifted	I mustn't have been lifting
you mustn't have been lifting
she mustn't have been lifting
we mustn't have been lifting
you mustn't have been lifting
they mustn't have been lifting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I lift?
must you lift?
must she lift?
must we lift?
must you lift?
must they lift? 	must I be lifting?
must you be lifting?
must she be lifting?
must we be lifting?
must you be lifting?
must they be lifting? 	must I have lifted?
must you have lifted?
must she have lifted?
must we have lifted?
must you have lifted?
must they have lifted? 	must I have been lifting?
must you have been lifting?
must she have been lifting?
must we have been lifting?
must you have been lifting?
must they have been lifting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I lift?
mustn't you lift?
mustn't she lift?
mustn't we lift?
mustn't you lift?
mustn't they lift? 	mustn't I be lifting?
mustn't you be lifting?
mustn't she be lifting?
mustn't we be lifting?
mustn't you be lifting?
mustn't they be lifting? 	mustn't I have lifted?
mustn't you have lifted?
mustn't she have lifted?
mustn't we have lifted?
mustn't you have lifted?
mustn't they have lifted? 	mustn't I have been lifting?
mustn't you have been lifting?
mustn't she have been lifting?
mustn't we have been lifting?
mustn't you have been lifting?
mustn't they have been lifting?