I could evacuate you could evacuate she could evacuate we could evacuate you could evacuate they could evacuate
V-ing form
I could be evacuating you could be evacuating she could be evacuating we could be evacuating you could be evacuating they could be evacuating
Perfect
I could have evacuated you could have evacuated she 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 she 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 she 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 she 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 she 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 she 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 she evacuate? could we evacuate? could you evacuate? could they evacuate?
V-ing form
could I be evacuating? could you be evacuating? could she be evacuating? could we be evacuating? could you be evacuating? could they be evacuating?
Perfect
could I have evacuated? could you have evacuated? could she 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 she 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 she 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 she 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 she 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 she have been evacuating? couldn't we have been evacuating? couldn't you have been evacuating? couldn't they have been evacuating?