Conjugación del verbo inglés
MUST INVESTIGATE

Verbo regular: investigate - investigated - investigated

Afirmación

Forma simple	Forma con V-ing
I must investigate you must investigate he must investigate we must investigate you must investigate they must investigate	I must be investigating you must be investigating he must be investigating we must be investigating you must be investigating they must be investigating
Perfecto	Perfecto con V-ing
I must have investigated you must have investigated he must have investigated we must have investigated you must have investigated they must have investigated	I must have been investigating you must have been investigating he must have been investigating we must have been investigating you must have been investigating they must have been investigating

Negación

Forma simple	Forma con V-ing
I mustn't investigate you mustn't investigate he mustn't investigate we mustn't investigate you mustn't investigate they mustn't investigate	I mustn't be investigating you mustn't be investigating he mustn't be investigating we mustn't be investigating you mustn't be investigating they mustn't be investigating
Perfecto	Perfecto con V-ing
I mustn't have investigated you mustn't have investigated he mustn't have investigated we mustn't have investigated you mustn't have investigated they mustn't have investigated	I mustn't have been investigating you mustn't have been investigating he mustn't have been investigating we mustn't have been investigating you mustn't have been investigating they mustn't have been investigating

Forma interrogativa

Forma simple	Forma con V-ing
must I investigate? must you investigate? must he investigate? must we investigate? must you investigate? must they investigate?	must I be investigating? must you be investigating? must he be investigating? must we be investigating? must you be investigating? must they be investigating?
Perfecto	Perfecto con V-ing
must I have investigated? must you have investigated? must he have investigated? must we have investigated? must you have investigated? must they have investigated?	must I have been investigating? must you have been investigating? must he have been investigating? must we have been investigating? must you have been investigating? must they have been investigating?

Forma interro-negativa

Forma simple	Forma con V-ing
mustn't I investigate? mustn't you investigate? mustn't he investigate? mustn't we investigate? mustn't you investigate? mustn't they investigate?	mustn't I be investigating? mustn't you be investigating? mustn't he be investigating? mustn't we be investigating? mustn't you be investigating? mustn't they be investigating?
Perfecto	Perfecto con V-ing
mustn't I have investigated? mustn't you have investigated? mustn't he have investigated? mustn't we have investigated? mustn't you have investigated? mustn't they have investigated?	mustn't I have been investigating? mustn't you have been investigating? mustn't he have been investigating? mustn't we have been investigating? mustn't you have been investigating? mustn't they have been investigating?