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