Conjugación del verbo inglés
MUST PREHEAT

Verbo regular: preheat - preheated - preheated

Afirmación

Forma simple	Forma con V-ing
I must preheat you must preheat he must preheat we must preheat you must preheat they must preheat	I must be preheating you must be preheating he must be preheating we must be preheating you must be preheating they must be preheating
Perfecto	Perfecto con V-ing
I must have preheated you must have preheated he must have preheated we must have preheated you must have preheated they must have preheated	I must have been preheating you must have been preheating he must have been preheating we must have been preheating you must have been preheating they must have been preheating

Negación

Forma simple	Forma con V-ing
I must not preheat you must not preheat he must not preheat we must not preheat you must not preheat they must not preheat	I must not be preheating you must not be preheating he must not be preheating we must not be preheating you must not be preheating they must not be preheating
Perfecto	Perfecto con V-ing
I must not have preheated you must not have preheated he must not have preheated we must not have preheated you must not have preheated they must not have preheated	I must not have been preheating you must not have been preheating he must not have been preheating we must not have been preheating you must not have been preheating they must not have been preheating

Forma interrogativa

Forma simple	Forma con V-ing
must I preheat? must you preheat? must he preheat? must we preheat? must you preheat? must they preheat?	must I be preheating? must you be preheating? must he be preheating? must we be preheating? must you be preheating? must they be preheating?
Perfecto	Perfecto con V-ing
must I have preheated? must you have preheated? must he have preheated? must we have preheated? must you have preheated? must they have preheated?	must I have been preheating? must you have been preheating? must he have been preheating? must we have been preheating? must you have been preheating? must they have been preheating?

Forma interro-negativa

Forma simple	Forma con V-ing
must I not preheat? must you not preheat? must he not preheat? must we not preheat? must you not preheat? must they not preheat?	must I not be preheating? must you not be preheating? must he not be preheating? must we not be preheating? must you not be preheating? must they not be preheating?
Perfecto	Perfecto con V-ing
must I not have preheated? must you not have preheated? must he not have preheated? must we not have preheated? must you not have preheated? must they not have preheated?	must I not have been preheating? must you not have been preheating? must he not have been preheating? must we not have been preheating? must you not have been preheating? must they not have been preheating?