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