I could hospitalize you could hospitalize she could hospitalize we could hospitalize you could hospitalize they could hospitalize
V-ing form
I could be hospitalizing you could be hospitalizing she could be hospitalizing we could be hospitalizing you could be hospitalizing they could be hospitalizing
Perfect
I could have hospitalized you could have hospitalized she 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 she 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 she 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 she 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 she 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 she 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 she hospitalize? could we hospitalize? could you hospitalize? could they hospitalize?
V-ing form
could I be hospitalizing? could you be hospitalizing? could she be hospitalizing? could we be hospitalizing? could you be hospitalizing? could they be hospitalizing?
Perfect
could I have hospitalized? could you have hospitalized? could she 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 she 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 she 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 she 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 she 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 she have been hospitalizing? couldn't we have been hospitalizing? couldn't you have been hospitalizing? couldn't they have been hospitalizing?