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