English verb conjugation
COULD DESTROY

Regular verb: destroy - destroyed - destroyed

Affirmation

Simple form	V-ing form
I could destroy you could destroy he could destroy we could destroy you could destroy they could destroy	I could be destroying you could be destroying he could be destroying we could be destroying you could be destroying they could be destroying
Perfect	V-ing perfect
I could have destroyed you could have destroyed he could have destroyed we could have destroyed you could have destroyed they could have destroyed	I could have been destroying you could have been destroying he could have been destroying we could have been destroying you could have been destroying they could have been destroying

Negation

Simple form	V-ing form
I couldn't destroy you couldn't destroy he couldn't destroy we couldn't destroy you couldn't destroy they couldn't destroy	I couldn't be destroying you couldn't be destroying he couldn't be destroying we couldn't be destroying you couldn't be destroying they couldn't be destroying
Perfect	V-ing perfect
I couldn't have destroyed you couldn't have destroyed he couldn't have destroyed we couldn't have destroyed you couldn't have destroyed they couldn't have destroyed	I couldn't have been destroying you couldn't have been destroying he couldn't have been destroying we couldn't have been destroying you couldn't have been destroying they couldn't have been destroying

Interrogative form

Simple form	V-ing form
could I destroy? could you destroy? could he destroy? could we destroy? could you destroy? could they destroy?	could I be destroying? could you be destroying? could he be destroying? could we be destroying? could you be destroying? could they be destroying?
Perfect	V-ing perfect
could I have destroyed? could you have destroyed? could he have destroyed? could we have destroyed? could you have destroyed? could they have destroyed?	could I have been destroying? could you have been destroying? could he have been destroying? could we have been destroying? could you have been destroying? could they have been destroying?

Interro-negative form

Simple form	V-ing form
couldn't I destroy? couldn't you destroy? couldn't he destroy? couldn't we destroy? couldn't you destroy? couldn't they destroy?	couldn't I be destroying? couldn't you be destroying? couldn't he be destroying? couldn't we be destroying? couldn't you be destroying? couldn't they be destroying?
Perfect	V-ing perfect
couldn't I have destroyed? couldn't you have destroyed? couldn't he have destroyed? couldn't we have destroyed? couldn't you have destroyed? couldn't they have destroyed?	couldn't I have been destroying? couldn't you have been destroying? couldn't he have been destroying? couldn't we have been destroying? couldn't you have been destroying? couldn't they have been destroying?