I could volatilize you could volatilize she could volatilize we could volatilize you could volatilize they could volatilize
V-ing form
I could be volatilizing you could be volatilizing she could be volatilizing we could be volatilizing you could be volatilizing they could be volatilizing
Perfect
I could have volatilized you could have volatilized she 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 she 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 she 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 she 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 she 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 she 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 she volatilize? could we volatilize? could you volatilize? could they volatilize?
V-ing form
could I be volatilizing? could you be volatilizing? could she be volatilizing? could we be volatilizing? could you be volatilizing? could they be volatilizing?
Perfect
could I have volatilized? could you have volatilized? could she 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 she 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 she 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 she 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 she 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 she have been volatilizing? couldn't we have been volatilizing? couldn't you have been volatilizing? couldn't they have been volatilizing?