could fluoridate
Regular verb: fluoridate - fluoridated- fluoridated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could fluoridate
you could fluoridate
she could fluoridate
we could fluoridate
you could fluoridate
they could fluoridate 	I could be fluoridating
you could be fluoridating
she could be fluoridating
we could be fluoridating
you could be fluoridating
they could be fluoridating	I could have fluoridated
you could have fluoridated
she could have fluoridated
we could have fluoridated
you could have fluoridated
they could have fluoridated	I could have been fluoridating
you could have been fluoridating
she could have been fluoridating
we could have been fluoridating
you could have been fluoridating
they could have been fluoridating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't fluoridate
you couldn't fluoridate
she couldn't fluoridate
we couldn't fluoridate
you couldn't fluoridate
they couldn't fluoridate 	I couldn't be fluoridating
you couldn't be fluoridating
she couldn't be fluoridating
we couldn't be fluoridating
you couldn't be fluoridating
they couldn't be fluoridating	I couldn't have fluoridated
you couldn't have fluoridated
she couldn't have fluoridated
we couldn't have fluoridated
you couldn't have fluoridated
they couldn't have fluoridated	I couldn't have been fluoridating
you couldn't have been fluoridating
she couldn't have been fluoridating
we couldn't have been fluoridating
you couldn't have been fluoridating
they couldn't have been fluoridating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I fluoridate?
could you fluoridate?
could she fluoridate?
could we fluoridate?
could you fluoridate?
could they fluoridate? 	could I be fluoridating?
could you be fluoridating?
could she be fluoridating?
could we be fluoridating?
could you be fluoridating?
could they be fluoridating? 	could I have fluoridated?
could you have fluoridated?
could she have fluoridated?
could we have fluoridated?
could you have fluoridated?
could they have fluoridated? 	could I have been fluoridating?
could you have been fluoridating?
could she have been fluoridating?
could we have been fluoridating?
could you have been fluoridating?
could they have been fluoridating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I fluoridate?
couldn't you fluoridate?
couldn't she fluoridate?
couldn't we fluoridate?
couldn't you fluoridate?
couldn't they fluoridate? 	couldn't I be fluoridating?
couldn't you be fluoridating?
couldn't she be fluoridating?
couldn't we be fluoridating?
couldn't you be fluoridating?
couldn't they be fluoridating? 	couldn't I have fluoridated?
couldn't you have fluoridated?
couldn't she have fluoridated?
couldn't we have fluoridated?
couldn't you have fluoridated?
couldn't they have fluoridated? 	couldn't I have been fluoridating?
couldn't you have been fluoridating?
couldn't she have been fluoridating?
couldn't we have been fluoridating?
couldn't you have been fluoridating?
couldn't they have been fluoridating?