must vacillate
Verbo regular: vacillate - vacillated- vacillated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must vacillate
you must vacillate
he must vacillate
we must vacillate
you must vacillate
they must vacillate 	I must be vacillating
you must be vacillating
he must be vacillating
we must be vacillating
you must be vacillating
they must be vacillating	I must have vacillated
you must have vacillated
he must have vacillated
we must have vacillated
you must have vacillated
they must have vacillated	I must have been vacillating
you must have been vacillating
he must have been vacillating
we must have been vacillating
you must have been vacillating
they must have been vacillating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not vacillate
you must not vacillate
he must not vacillate
we must not vacillate
you must not vacillate
they must not vacillate 	I must not be vacillating
you must not be vacillating
he must not be vacillating
we must not be vacillating
you must not be vacillating
they must not be vacillating	I must not have vacillated
you must not have vacillated
he must not have vacillated
we must not have vacillated
you must not have vacillated
they must not have vacillated	I must not have been vacillating
you must not have been vacillating
he must not have been vacillating
we must not have been vacillating
you must not have been vacillating
they must not have been vacillating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I vacillate?
must you vacillate?
must he vacillate?
must we vacillate?
must you vacillate?
must they vacillate? 	must I be vacillating?
must you be vacillating?
must he be vacillating?
must we be vacillating?
must you be vacillating?
must they be vacillating? 	must I have vacillated?
must you have vacillated?
must he have vacillated?
must we have vacillated?
must you have vacillated?
must they have vacillated? 	must I have been vacillating?
must you have been vacillating?
must he have been vacillating?
must we have been vacillating?
must you have been vacillating?
must they have been vacillating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not vacillate?
must you not vacillate?
must he not vacillate?
must we not vacillate?
must you not vacillate?
must they not vacillate? 	must I not be vacillating?
must you not be vacillating?
must he not be vacillating?
must we not be vacillating?
must you not be vacillating?
must they not be vacillating? 	must I not have vacillated?
must you not have vacillated?
must he not have vacillated?
must we not have vacillated?
must you not have vacillated?
must they not have vacillated? 	must I not have been vacillating?
must you not have been vacillating?
must he not have been vacillating?
must we not have been vacillating?
must you not have been vacillating?
must they not have been vacillating?