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