Conjugación del verbo inglés
MUST USE

Verbo regular: use - used - used

Afirmación

Forma simple	Forma con V-ing
I must use you must use he must use we must use you must use they must use	I must be using you must be using he must be using we must be using you must be using they must be using
Perfecto	Perfecto con V-ing
I must have used you must have used he must have used we must have used you must have used they must have used	I must have been using you must have been using he must have been using we must have been using you must have been using they must have been using

Negación

Forma simple	Forma con V-ing
I mustn't use you mustn't use he mustn't use we mustn't use you mustn't use they mustn't use	I mustn't be using you mustn't be using he mustn't be using we mustn't be using you mustn't be using they mustn't be using
Perfecto	Perfecto con V-ing
I mustn't have used you mustn't have used he mustn't have used we mustn't have used you mustn't have used they mustn't have used	I mustn't have been using you mustn't have been using he mustn't have been using we mustn't have been using you mustn't have been using they mustn't have been using

Forma interrogativa

Forma simple	Forma con V-ing
must I use? must you use? must he use? must we use? must you use? must they use?	must I be using? must you be using? must he be using? must we be using? must you be using? must they be using?
Perfecto	Perfecto con V-ing
must I have used? must you have used? must he have used? must we have used? must you have used? must they have used?	must I have been using? must you have been using? must he have been using? must we have been using? must you have been using? must they have been using?

Forma interro-negativa

Forma simple	Forma con V-ing
mustn't I use? mustn't you use? mustn't he use? mustn't we use? mustn't you use? mustn't they use?	mustn't I be using? mustn't you be using? mustn't he be using? mustn't we be using? mustn't you be using? mustn't they be using?
Perfecto	Perfecto con V-ing
mustn't I have used? mustn't you have used? mustn't he have used? mustn't we have used? mustn't you have used? mustn't they have used?	mustn't I have been using? mustn't you have been using? mustn't he have been using? mustn't we have been using? mustn't you have been using? mustn't they have been using?