I could disperse you could disperse she could disperse we could disperse you could disperse they could disperse
V-ing form
I could be dispersing you could be dispersing she could be dispersing we could be dispersing you could be dispersing they could be dispersing
Perfect
I could have dispersed you could have dispersed she could have dispersed we could have dispersed you could have dispersed they could have dispersed
V-ing perfect
I could have been dispersing you could have been dispersing she could have been dispersing we could have been dispersing you could have been dispersing they could have been dispersing
Negation
Simple form
I couldn't disperse you couldn't disperse she couldn't disperse we couldn't disperse you couldn't disperse they couldn't disperse
V-ing form
I couldn't be dispersing you couldn't be dispersing she couldn't be dispersing we couldn't be dispersing you couldn't be dispersing they couldn't be dispersing
Perfect
I couldn't have dispersed you couldn't have dispersed she couldn't have dispersed we couldn't have dispersed you couldn't have dispersed they couldn't have dispersed
V-ing perfect
I couldn't have been dispersing you couldn't have been dispersing she couldn't have been dispersing we couldn't have been dispersing you couldn't have been dispersing they couldn't have been dispersing
Interrogative form
Simple form
could I disperse? could you disperse? could she disperse? could we disperse? could you disperse? could they disperse?
V-ing form
could I be dispersing? could you be dispersing? could she be dispersing? could we be dispersing? could you be dispersing? could they be dispersing?
Perfect
could I have dispersed? could you have dispersed? could she have dispersed? could we have dispersed? could you have dispersed? could they have dispersed?
V-ing perfect
could I have been dispersing? could you have been dispersing? could she have been dispersing? could we have been dispersing? could you have been dispersing? could they have been dispersing?
Interro-negative form
Simple form
couldn't I disperse? couldn't you disperse? couldn't she disperse? couldn't we disperse? couldn't you disperse? couldn't they disperse?
V-ing form
couldn't I be dispersing? couldn't you be dispersing? couldn't she be dispersing? couldn't we be dispersing? couldn't you be dispersing? couldn't they be dispersing?
Perfect
couldn't I have dispersed? couldn't you have dispersed? couldn't she have dispersed? couldn't we have dispersed? couldn't you have dispersed? couldn't they have dispersed?
V-ing perfect
couldn't I have been dispersing? couldn't you have been dispersing? couldn't she have been dispersing? couldn't we have been dispersing? couldn't you have been dispersing? couldn't they have been dispersing?