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