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