I could sensitize you could sensitize she could sensitize we could sensitize you could sensitize they could sensitize
V-ing form
I could be sensitizing you could be sensitizing she could be sensitizing we could be sensitizing you could be sensitizing they could be sensitizing
Perfect
I could have sensitized you could have sensitized she could have sensitized we could have sensitized you could have sensitized they could have sensitized
V-ing perfect
I could have been sensitizing you could have been sensitizing she could have been sensitizing we could have been sensitizing you could have been sensitizing they could have been sensitizing
Negation
Simple form
I couldn't sensitize you couldn't sensitize she couldn't sensitize we couldn't sensitize you couldn't sensitize they couldn't sensitize
V-ing form
I couldn't be sensitizing you couldn't be sensitizing she couldn't be sensitizing we couldn't be sensitizing you couldn't be sensitizing they couldn't be sensitizing
Perfect
I couldn't have sensitized you couldn't have sensitized she couldn't have sensitized we couldn't have sensitized you couldn't have sensitized they couldn't have sensitized
V-ing perfect
I couldn't have been sensitizing you couldn't have been sensitizing she couldn't have been sensitizing we couldn't have been sensitizing you couldn't have been sensitizing they couldn't have been sensitizing
Interrogative form
Simple form
could I sensitize? could you sensitize? could she sensitize? could we sensitize? could you sensitize? could they sensitize?
V-ing form
could I be sensitizing? could you be sensitizing? could she be sensitizing? could we be sensitizing? could you be sensitizing? could they be sensitizing?
Perfect
could I have sensitized? could you have sensitized? could she have sensitized? could we have sensitized? could you have sensitized? could they have sensitized?
V-ing perfect
could I have been sensitizing? could you have been sensitizing? could she have been sensitizing? could we have been sensitizing? could you have been sensitizing? could they have been sensitizing?
Interro-negative form
Simple form
couldn't I sensitize? couldn't you sensitize? couldn't she sensitize? couldn't we sensitize? couldn't you sensitize? couldn't they sensitize?
V-ing form
couldn't I be sensitizing? couldn't you be sensitizing? couldn't she be sensitizing? couldn't we be sensitizing? couldn't you be sensitizing? couldn't they be sensitizing?
Perfect
couldn't I have sensitized? couldn't you have sensitized? couldn't she have sensitized? couldn't we have sensitized? couldn't you have sensitized? couldn't they have sensitized?
V-ing perfect
couldn't I have been sensitizing? couldn't you have been sensitizing? couldn't she have been sensitizing? couldn't we have been sensitizing? couldn't you have been sensitizing? couldn't they have been sensitizing?