could fluoresce
Regular verb: fluoresce - fluoresced- fluoresced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could fluoresce
you could fluoresce
he could fluoresce
we could fluoresce
you could fluoresce
they could fluoresce 	I could be fluorescing
you could be fluorescing
he could be fluorescing
we could be fluorescing
you could be fluorescing
they could be fluorescing	I could have fluoresced
you could have fluoresced
he could have fluoresced
we could have fluoresced
you could have fluoresced
they could have fluoresced	I could have been fluorescing
you could have been fluorescing
he could have been fluorescing
we could have been fluorescing
you could have been fluorescing
they could have been fluorescing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't fluoresce
you couldn't fluoresce
he couldn't fluoresce
we couldn't fluoresce
you couldn't fluoresce
they couldn't fluoresce 	I couldn't be fluorescing
you couldn't be fluorescing
he couldn't be fluorescing
we couldn't be fluorescing
you couldn't be fluorescing
they couldn't be fluorescing	I couldn't have fluoresced
you couldn't have fluoresced
he couldn't have fluoresced
we couldn't have fluoresced
you couldn't have fluoresced
they couldn't have fluoresced	I couldn't have been fluorescing
you couldn't have been fluorescing
he couldn't have been fluorescing
we couldn't have been fluorescing
you couldn't have been fluorescing
they couldn't have been fluorescing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I fluoresce?
could you fluoresce?
could he fluoresce?
could we fluoresce?
could you fluoresce?
could they fluoresce? 	could I be fluorescing?
could you be fluorescing?
could he be fluorescing?
could we be fluorescing?
could you be fluorescing?
could they be fluorescing? 	could I have fluoresced?
could you have fluoresced?
could he have fluoresced?
could we have fluoresced?
could you have fluoresced?
could they have fluoresced? 	could I have been fluorescing?
could you have been fluorescing?
could he have been fluorescing?
could we have been fluorescing?
could you have been fluorescing?
could they have been fluorescing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I fluoresce?
couldn't you fluoresce?
couldn't he fluoresce?
couldn't we fluoresce?
couldn't you fluoresce?
couldn't they fluoresce? 	couldn't I be fluorescing?
couldn't you be fluorescing?
couldn't he be fluorescing?
couldn't we be fluorescing?
couldn't you be fluorescing?
couldn't they be fluorescing? 	couldn't I have fluoresced?
couldn't you have fluoresced?
couldn't he have fluoresced?
couldn't we have fluoresced?
couldn't you have fluoresced?
couldn't they have fluoresced? 	couldn't I have been fluorescing?
couldn't you have been fluorescing?
couldn't he have been fluorescing?
couldn't we have been fluorescing?
couldn't you have been fluorescing?
couldn't they have been fluorescing?