English verb conjugation
COULD DAMAGE

Regular verb: damage - damaged - damaged

Affirmation

Simple form	V-ing form
I could damage you could damage she could damage we could damage you could damage they could damage	I could be damaging you could be damaging she could be damaging we could be damaging you could be damaging they could be damaging
Perfect	V-ing perfect
I could have damaged you could have damaged she could have damaged we could have damaged you could have damaged they could have damaged	I could have been damaging you could have been damaging she could have been damaging we could have been damaging you could have been damaging they could have been damaging

Negation

Simple form	V-ing form
I couldn't damage you couldn't damage she couldn't damage we couldn't damage you couldn't damage they couldn't damage	I couldn't be damaging you couldn't be damaging she couldn't be damaging we couldn't be damaging you couldn't be damaging they couldn't be damaging
Perfect	V-ing perfect
I couldn't have damaged you couldn't have damaged she couldn't have damaged we couldn't have damaged you couldn't have damaged they couldn't have damaged	I couldn't have been damaging you couldn't have been damaging she couldn't have been damaging we couldn't have been damaging you couldn't have been damaging they couldn't have been damaging

Interrogative form

Simple form	V-ing form
could I damage? could you damage? could she damage? could we damage? could you damage? could they damage?	could I be damaging? could you be damaging? could she be damaging? could we be damaging? could you be damaging? could they be damaging?
Perfect	V-ing perfect
could I have damaged? could you have damaged? could she have damaged? could we have damaged? could you have damaged? could they have damaged?	could I have been damaging? could you have been damaging? could she have been damaging? could we have been damaging? could you have been damaging? could they have been damaging?

Interro-negative form

Simple form	V-ing form
couldn't I damage? couldn't you damage? couldn't she damage? couldn't we damage? couldn't you damage? couldn't they damage?	couldn't I be damaging? couldn't you be damaging? couldn't she be damaging? couldn't we be damaging? couldn't you be damaging? couldn't they be damaging?
Perfect	V-ing perfect
couldn't I have damaged? couldn't you have damaged? couldn't she have damaged? couldn't we have damaged? couldn't you have damaged? couldn't they have damaged?	couldn't I have been damaging? couldn't you have been damaging? couldn't she have been damaging? couldn't we have been damaging? couldn't you have been damaging? couldn't they have been damaging?