English verb conjugation
COULD SENSITIZE

Regular verb: sensitize - sensitized - sensitized

Affirmation

Simple form	V-ing form
I could sensitize you could sensitize he could sensitize we could sensitize you could sensitize they could sensitize	I could be sensitizing you could be sensitizing he could be sensitizing we could be sensitizing you could be sensitizing they could be sensitizing
Perfect	V-ing perfect
I could have sensitized you could have sensitized he could have sensitized we could have sensitized you could have sensitized they could have sensitized	I could have been sensitizing you could have been sensitizing he could have been sensitizing we could have been sensitizing you could have been sensitizing they could have been sensitizing

Negation

Simple form	V-ing form
I couldn't sensitize you couldn't sensitize he couldn't sensitize we couldn't sensitize you couldn't sensitize they couldn't sensitize	I couldn't be sensitizing you couldn't be sensitizing he couldn't be sensitizing we couldn't be sensitizing you couldn't be sensitizing they couldn't be sensitizing
Perfect	V-ing perfect
I couldn't have sensitized you couldn't have sensitized he couldn't have sensitized we couldn't have sensitized you couldn't have sensitized they couldn't have sensitized	I couldn't have been sensitizing you couldn't have been sensitizing he 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	V-ing form
could I sensitize? could you sensitize? could he sensitize? could we sensitize? could you sensitize? could they sensitize?	could I be sensitizing? could you be sensitizing? could he be sensitizing? could we be sensitizing? could you be sensitizing? could they be sensitizing?
Perfect	V-ing perfect
could I have sensitized? could you have sensitized? could he have sensitized? could we have sensitized? could you have sensitized? could they have sensitized?	could I have been sensitizing? could you have been sensitizing? could he have been sensitizing? could we have been sensitizing? could you have been sensitizing? could they have been sensitizing?

Interro-negative form

Simple form	V-ing form
couldn't I sensitize? couldn't you sensitize? couldn't he sensitize? couldn't we sensitize? couldn't you sensitize? couldn't they sensitize?	couldn't I be sensitizing? couldn't you be sensitizing? couldn't he be sensitizing? couldn't we be sensitizing? couldn't you be sensitizing? couldn't they be sensitizing?
Perfect	V-ing perfect
couldn't I have sensitized? couldn't you have sensitized? couldn't he have sensitized? couldn't we have sensitized? couldn't you have sensitized? couldn't they have sensitized?	couldn't I have been sensitizing? couldn't you have been sensitizing? couldn't he have been sensitizing? couldn't we have been sensitizing? couldn't you have been sensitizing? couldn't they have been sensitizing?