I could diazotize you could diazotize he could diazotize we could diazotize you could diazotize they could diazotize
V-ing form
I could be diazotizing you could be diazotizing he could be diazotizing we could be diazotizing you could be diazotizing they could be diazotizing
Perfect
I could have diazotized you could have diazotized he could have diazotized we could have diazotized you could have diazotized they could have diazotized
V-ing perfect
I could have been diazotizing you could have been diazotizing he could have been diazotizing we could have been diazotizing you could have been diazotizing they could have been diazotizing
Negation
Simple form
I couldn't diazotize you couldn't diazotize he couldn't diazotize we couldn't diazotize you couldn't diazotize they couldn't diazotize
V-ing form
I couldn't be diazotizing you couldn't be diazotizing he couldn't be diazotizing we couldn't be diazotizing you couldn't be diazotizing they couldn't be diazotizing
Perfect
I couldn't have diazotized you couldn't have diazotized he couldn't have diazotized we couldn't have diazotized you couldn't have diazotized they couldn't have diazotized
V-ing perfect
I couldn't have been diazotizing you couldn't have been diazotizing he couldn't have been diazotizing we couldn't have been diazotizing you couldn't have been diazotizing they couldn't have been diazotizing
Interrogative form
Simple form
could I diazotize? could you diazotize? could he diazotize? could we diazotize? could you diazotize? could they diazotize?
V-ing form
could I be diazotizing? could you be diazotizing? could he be diazotizing? could we be diazotizing? could you be diazotizing? could they be diazotizing?
Perfect
could I have diazotized? could you have diazotized? could he have diazotized? could we have diazotized? could you have diazotized? could they have diazotized?
V-ing perfect
could I have been diazotizing? could you have been diazotizing? could he have been diazotizing? could we have been diazotizing? could you have been diazotizing? could they have been diazotizing?
Interro-negative form
Simple form
couldn't I diazotize? couldn't you diazotize? couldn't he diazotize? couldn't we diazotize? couldn't you diazotize? couldn't they diazotize?
V-ing form
couldn't I be diazotizing? couldn't you be diazotizing? couldn't he be diazotizing? couldn't we be diazotizing? couldn't you be diazotizing? couldn't they be diazotizing?
Perfect
couldn't I have diazotized? couldn't you have diazotized? couldn't he have diazotized? couldn't we have diazotized? couldn't you have diazotized? couldn't they have diazotized?
V-ing perfect
couldn't I have been diazotizing? couldn't you have been diazotizing? couldn't he have been diazotizing? couldn't we have been diazotizing? couldn't you have been diazotizing? couldn't they have been diazotizing?