could carboxylate
Regular verb: carboxylate - carboxylated- carboxylated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could carboxylate
you could carboxylate
she could carboxylate
we could carboxylate
you could carboxylate
they could carboxylate 	I could be carboxylating
you could be carboxylating
she could be carboxylating
we could be carboxylating
you could be carboxylating
they could be carboxylating	I could have carboxylated
you could have carboxylated
she could have carboxylated
we could have carboxylated
you could have carboxylated
they could have carboxylated	I could have been carboxylating
you could have been carboxylating
she could have been carboxylating
we could have been carboxylating
you could have been carboxylating
they could have been carboxylating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't carboxylate
you couldn't carboxylate
she couldn't carboxylate
we couldn't carboxylate
you couldn't carboxylate
they couldn't carboxylate 	I couldn't be carboxylating
you couldn't be carboxylating
she couldn't be carboxylating
we couldn't be carboxylating
you couldn't be carboxylating
they couldn't be carboxylating	I couldn't have carboxylated
you couldn't have carboxylated
she couldn't have carboxylated
we couldn't have carboxylated
you couldn't have carboxylated
they couldn't have carboxylated	I couldn't have been carboxylating
you couldn't have been carboxylating
she couldn't have been carboxylating
we couldn't have been carboxylating
you couldn't have been carboxylating
they couldn't have been carboxylating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I carboxylate?
could you carboxylate?
could she carboxylate?
could we carboxylate?
could you carboxylate?
could they carboxylate? 	could I be carboxylating?
could you be carboxylating?
could she be carboxylating?
could we be carboxylating?
could you be carboxylating?
could they be carboxylating? 	could I have carboxylated?
could you have carboxylated?
could she have carboxylated?
could we have carboxylated?
could you have carboxylated?
could they have carboxylated? 	could I have been carboxylating?
could you have been carboxylating?
could she have been carboxylating?
could we have been carboxylating?
could you have been carboxylating?
could they have been carboxylating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I carboxylate?
couldn't you carboxylate?
couldn't she carboxylate?
couldn't we carboxylate?
couldn't you carboxylate?
couldn't they carboxylate? 	couldn't I be carboxylating?
couldn't you be carboxylating?
couldn't she be carboxylating?
couldn't we be carboxylating?
couldn't you be carboxylating?
couldn't they be carboxylating? 	couldn't I have carboxylated?
couldn't you have carboxylated?
couldn't she have carboxylated?
couldn't we have carboxylated?
couldn't you have carboxylated?
couldn't they have carboxylated? 	couldn't I have been carboxylating?
couldn't you have been carboxylating?
couldn't she have been carboxylating?
couldn't we have been carboxylating?
couldn't you have been carboxylating?
couldn't they have been carboxylating?