must endeavor
Verbo regular: endeavor - endeavored- endeavored

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must endeavor
you must endeavor
he must endeavor
we must endeavor
you must endeavor
they must endeavor 	I must be endeavoring
you must be endeavoring
he must be endeavoring
we must be endeavoring
you must be endeavoring
they must be endeavoring	I must have endeavored
you must have endeavored
he must have endeavored
we must have endeavored
you must have endeavored
they must have endeavored	I must have been endeavoring
you must have been endeavoring
he must have been endeavoring
we must have been endeavoring
you must have been endeavoring
they must have been endeavoring	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not endeavor
you must not endeavor
he must not endeavor
we must not endeavor
you must not endeavor
they must not endeavor 	I must not be endeavoring
you must not be endeavoring
he must not be endeavoring
we must not be endeavoring
you must not be endeavoring
they must not be endeavoring	I must not have endeavored
you must not have endeavored
he must not have endeavored
we must not have endeavored
you must not have endeavored
they must not have endeavored	I must not have been endeavoring
you must not have been endeavoring
he must not have been endeavoring
we must not have been endeavoring
you must not have been endeavoring
they must not have been endeavoring	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I endeavor?
must you endeavor?
must he endeavor?
must we endeavor?
must you endeavor?
must they endeavor? 	must I be endeavoring?
must you be endeavoring?
must he be endeavoring?
must we be endeavoring?
must you be endeavoring?
must they be endeavoring? 	must I have endeavored?
must you have endeavored?
must he have endeavored?
must we have endeavored?
must you have endeavored?
must they have endeavored? 	must I have been endeavoring?
must you have been endeavoring?
must he have been endeavoring?
must we have been endeavoring?
must you have been endeavoring?
must they have been endeavoring? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not endeavor?
must you not endeavor?
must he not endeavor?
must we not endeavor?
must you not endeavor?
must they not endeavor? 	must I not be endeavoring?
must you not be endeavoring?
must he not be endeavoring?
must we not be endeavoring?
must you not be endeavoring?
must they not be endeavoring? 	must I not have endeavored?
must you not have endeavored?
must he not have endeavored?
must we not have endeavored?
must you not have endeavored?
must they not have endeavored? 	must I not have been endeavoring?
must you not have been endeavoring?
must he not have been endeavoring?
must we not have been endeavoring?
must you not have been endeavoring?
must they not have been endeavoring?