could destroy
Regular verb: destroy - destroyed- destroyed

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