I could acetylate you could acetylate she could acetylate we could acetylate you could acetylate they could acetylate
V-ing form
I could be acetylating you could be acetylating she could be acetylating we could be acetylating you could be acetylating they could be acetylating
Perfect
I could have acetylated you could have acetylated she could have acetylated we could have acetylated you could have acetylated they could have acetylated
V-ing perfect
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
I could not acetylate you could not acetylate she could not acetylate we could not acetylate you could not acetylate they could not acetylate
V-ing form
I could not be acetylating you could not be acetylating she could not be acetylating we could not be acetylating you could not be acetylating they could not be acetylating
Perfect
I could not have acetylated you could not have acetylated she could not have acetylated we could not have acetylated you could not have acetylated they could not have acetylated
V-ing perfect
I could not have been acetylating you could not have been acetylating she could not have been acetylating we could not have been acetylating you could not have been acetylating they could not have been acetylating
Interrogative form
Simple form
could I acetylate? could you acetylate? could she acetylate? could we acetylate? could you acetylate? could they acetylate?
V-ing form
could I be acetylating? could you be acetylating? could she be acetylating? could we be acetylating? could you be acetylating? could they be acetylating?
Perfect
could I have acetylated? could you have acetylated? could she have acetylated? could we have acetylated? could you have acetylated? could they have acetylated?
V-ing perfect
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
could I not acetylate? could you not acetylate? could she not acetylate? could we not acetylate? could you not acetylate? could they not acetylate?
V-ing form
could I not be acetylating? could you not be acetylating? could she not be acetylating? could we not be acetylating? could you not be acetylating? could they not be acetylating?
Perfect
could I not have acetylated? could you not have acetylated? could she not have acetylated? could we not have acetylated? could you not have acetylated? could they not have acetylated?
V-ing perfect
could I not have been acetylating? could you not have been acetylating? could she not have been acetylating? could we not have been acetylating? could you not have been acetylating? could they not have been acetylating?