can vacillate
Regular verb: vacillate - vacillated- vacillated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can vacillate
you can vacillate
he can vacillate
we can vacillate
you can vacillate
they can vacillate 	I can be vacillating
you can be vacillating
he can be vacillating
we can be vacillating
you can be vacillating
they can be vacillating	I can have vacillated
you can have vacillated
he can have vacillated
we can have vacillated
you can have vacillated
they can have vacillated	I can have been vacillating
you can have been vacillating
he can have been vacillating
we can have been vacillating
you can have been vacillating
they can have been vacillating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't vacillate
you can't vacillate
he can't vacillate
we can't vacillate
you can't vacillate
they can't vacillate 	I can't be vacillating
you can't be vacillating
he can't be vacillating
we can't be vacillating
you can't be vacillating
they can't be vacillating	I can't have vacillated
you can't have vacillated
he can't have vacillated
we can't have vacillated
you can't have vacillated
they can't have vacillated	I can't have been vacillating
you can't have been vacillating
he can't have been vacillating
we can't have been vacillating
you can't have been vacillating
they can't have been vacillating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I vacillate?
can you vacillate?
can he vacillate?
can we vacillate?
can you vacillate?
can they vacillate? 	can I be vacillating?
can you be vacillating?
can he be vacillating?
can we be vacillating?
can you be vacillating?
can they be vacillating? 	can I have vacillated?
can you have vacillated?
can he have vacillated?
can we have vacillated?
can you have vacillated?
can they have vacillated? 	can I have been vacillating?
can you have been vacillating?
can he have been vacillating?
can we have been vacillating?
can you have been vacillating?
can they have been vacillating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I vacillate?
can't you vacillate?
can't he vacillate?
can't we vacillate?
can't you vacillate?
can't they vacillate? 	can't I be vacillating?
can't you be vacillating?
can't he be vacillating?
can't we be vacillating?
can't you be vacillating?
can't they be vacillating? 	can't I have vacillated?
can't you have vacillated?
can't he have vacillated?
can't we have vacillated?
can't you have vacillated?
can't they have vacillated? 	can't I have been vacillating?
can't you have been vacillating?
can't he have been vacillating?
can't we have been vacillating?
can't you have been vacillating?
can't they have been vacillating?