could acetylate
Regular verb: acetylate - acetylated- acetylated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could acetylate
you could acetylate
she could acetylate
we could acetylate
you could acetylate
they could acetylate 	I could be acetylating
you could be acetylating
she could be acetylating
we could be acetylating
you could be acetylating
they could be acetylating	I could have acetylated
you could have acetylated
she could have acetylated
we could have acetylated
you could have acetylated
they could have acetylated	I could have been acetylating
you could have been acetylating
she could have been acetylating
we could have been acetylating
you could have been acetylating
they could have been acetylating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't acetylate
you couldn't acetylate
she couldn't acetylate
we couldn't acetylate
you couldn't acetylate
they couldn't acetylate 	I couldn't be acetylating
you couldn't be acetylating
she couldn't be acetylating
we couldn't be acetylating
you couldn't be acetylating
they couldn't be acetylating	I couldn't have acetylated
you couldn't have acetylated
she couldn't have acetylated
we couldn't have acetylated
you couldn't have acetylated
they couldn't have acetylated	I couldn't have been acetylating
you couldn't have been acetylating
she couldn't have been acetylating
we couldn't have been acetylating
you couldn't have been acetylating
they couldn't have been acetylating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I acetylate?
could you acetylate?
could she acetylate?
could we acetylate?
could you acetylate?
could they acetylate? 	could I be acetylating?
could you be acetylating?
could she be acetylating?
could we be acetylating?
could you be acetylating?
could they be acetylating? 	could I have acetylated?
could you have acetylated?
could she have acetylated?
could we have acetylated?
could you have acetylated?
could they have acetylated? 	could I have been acetylating?
could you have been acetylating?
could she have been acetylating?
could we have been acetylating?
could you have been acetylating?
could they have been acetylating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I acetylate?
couldn't you acetylate?
couldn't she acetylate?
couldn't we acetylate?
couldn't you acetylate?
couldn't they acetylate? 	couldn't I be acetylating?
couldn't you be acetylating?
couldn't she be acetylating?
couldn't we be acetylating?
couldn't you be acetylating?
couldn't they be acetylating? 	couldn't I have acetylated?
couldn't you have acetylated?
couldn't she have acetylated?
couldn't we have acetylated?
couldn't you have acetylated?
couldn't they have acetylated? 	couldn't I have been acetylating?
couldn't you have been acetylating?
couldn't she have been acetylating?
couldn't we have been acetylating?
couldn't you have been acetylating?
couldn't they have been acetylating?