I could rechromatograph you could rechromatograph she could rechromatograph we could rechromatograph you could rechromatograph they could rechromatograph
V-ing form
I could be rechromatographing you could be rechromatographing she could be rechromatographing we could be rechromatographing you could be rechromatographing they could be rechromatographing
Perfect
I could have rechromatographed you could have rechromatographed she could have rechromatographed we could have rechromatographed you could have rechromatographed they could have rechromatographed
V-ing perfect
I could have been rechromatographing you could have been rechromatographing she could have been rechromatographing we could have been rechromatographing you could have been rechromatographing they could have been rechromatographing
Negation
Simple form
I could not rechromatograph you could not rechromatograph she could not rechromatograph we could not rechromatograph you could not rechromatograph they could not rechromatograph
V-ing form
I could not be rechromatographing you could not be rechromatographing she could not be rechromatographing we could not be rechromatographing you could not be rechromatographing they could not be rechromatographing
Perfect
I could not have rechromatographed you could not have rechromatographed she could not have rechromatographed we could not have rechromatographed you could not have rechromatographed they could not have rechromatographed
V-ing perfect
I could not have been rechromatographing you could not have been rechromatographing she could not have been rechromatographing we could not have been rechromatographing you could not have been rechromatographing they could not have been rechromatographing
Interrogative form
Simple form
could I rechromatograph? could you rechromatograph? could she rechromatograph? could we rechromatograph? could you rechromatograph? could they rechromatograph?
V-ing form
could I be rechromatographing? could you be rechromatographing? could she be rechromatographing? could we be rechromatographing? could you be rechromatographing? could they be rechromatographing?
Perfect
could I have rechromatographed? could you have rechromatographed? could she have rechromatographed? could we have rechromatographed? could you have rechromatographed? could they have rechromatographed?
V-ing perfect
could I have been rechromatographing? could you have been rechromatographing? could she have been rechromatographing? could we have been rechromatographing? could you have been rechromatographing? could they have been rechromatographing?
Interro-negative form
Simple form
could I not rechromatograph? could you not rechromatograph? could she not rechromatograph? could we not rechromatograph? could you not rechromatograph? could they not rechromatograph?
V-ing form
could I not be rechromatographing? could you not be rechromatographing? could she not be rechromatographing? could we not be rechromatographing? could you not be rechromatographing? could they not be rechromatographing?
Perfect
could I not have rechromatographed? could you not have rechromatographed? could she not have rechromatographed? could we not have rechromatographed? could you not have rechromatographed? could they not have rechromatographed?
V-ing perfect
could I not have been rechromatographing? could you not have been rechromatographing? could she not have been rechromatographing? could we not have been rechromatographing? could you not have been rechromatographing? could they not have been rechromatographing?