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