can fluctuate
Regular verb: fluctuate - fluctuated- fluctuated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can fluctuate
you can fluctuate
he can fluctuate
we can fluctuate
you can fluctuate
they can fluctuate 	I can be fluctuating
you can be fluctuating
he can be fluctuating
we can be fluctuating
you can be fluctuating
they can be fluctuating	I can have fluctuated
you can have fluctuated
he can have fluctuated
we can have fluctuated
you can have fluctuated
they can have fluctuated	I can have been fluctuating
you can have been fluctuating
he can have been fluctuating
we can have been fluctuating
you can have been fluctuating
they can have been fluctuating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot fluctuate
you cannot fluctuate
he cannot fluctuate
we cannot fluctuate
you cannot fluctuate
they cannot fluctuate 	I cannot be fluctuating
you cannot be fluctuating
he cannot be fluctuating
we cannot be fluctuating
you cannot be fluctuating
they cannot be fluctuating	I cannot have fluctuated
you cannot have fluctuated
he cannot have fluctuated
we cannot have fluctuated
you cannot have fluctuated
they cannot have fluctuated	I cannot have been fluctuating
you cannot have been fluctuating
he cannot have been fluctuating
we cannot have been fluctuating
you cannot have been fluctuating
they cannot have been fluctuating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I fluctuate?
can you fluctuate?
can he fluctuate?
can we fluctuate?
can you fluctuate?
can they fluctuate? 	can I be fluctuating?
can you be fluctuating?
can he be fluctuating?
can we be fluctuating?
can you be fluctuating?
can they be fluctuating? 	can I have fluctuated?
can you have fluctuated?
can he have fluctuated?
can we have fluctuated?
can you have fluctuated?
can they have fluctuated? 	can I have been fluctuating?
can you have been fluctuating?
can he have been fluctuating?
can we have been fluctuating?
can you have been fluctuating?
can they have been fluctuating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not fluctuate?
can you not fluctuate?
can he not fluctuate?
can we not fluctuate?
can you not fluctuate?
can they not fluctuate? 	can I not be fluctuating?
can you not be fluctuating?
can he not be fluctuating?
can we not be fluctuating?
can you not be fluctuating?
can they not be fluctuating? 	can I not have fluctuated?
can you not have fluctuated?
can he not have fluctuated?
can we not have fluctuated?
can you not have fluctuated?
can they not have fluctuated? 	can I not have been fluctuating?
can you not have been fluctuating?
can he not have been fluctuating?
can we not have been fluctuating?
can you not have been fluctuating?
can they not have been fluctuating?