English verb conjugation
COULD BANG

Regular verb: bang - banged - banged

Affirmation

Simple form	V-ing form
I could bang you could bang he could bang we could bang you could bang they could bang	I could be banging you could be banging he could be banging we could be banging you could be banging they could be banging
Perfect	V-ing perfect
I could have banged you could have banged he could have banged we could have banged you could have banged they could have banged	I could have been banging you could have been banging he could have been banging we could have been banging you could have been banging they could have been banging

Negation

Simple form	V-ing form
I couldn't bang you couldn't bang he couldn't bang we couldn't bang you couldn't bang they couldn't bang	I couldn't be banging you couldn't be banging he couldn't be banging we couldn't be banging you couldn't be banging they couldn't be banging
Perfect	V-ing perfect
I couldn't have banged you couldn't have banged he couldn't have banged we couldn't have banged you couldn't have banged they couldn't have banged	I couldn't have been banging you couldn't have been banging he couldn't have been banging we couldn't have been banging you couldn't have been banging they couldn't have been banging

Interrogative form

Simple form	V-ing form
could I bang? could you bang? could he bang? could we bang? could you bang? could they bang?	could I be banging? could you be banging? could he be banging? could we be banging? could you be banging? could they be banging?
Perfect	V-ing perfect
could I have banged? could you have banged? could he have banged? could we have banged? could you have banged? could they have banged?	could I have been banging? could you have been banging? could he have been banging? could we have been banging? could you have been banging? could they have been banging?

Interro-negative form

Simple form	V-ing form
couldn't I bang? couldn't you bang? couldn't he bang? couldn't we bang? couldn't you bang? couldn't they bang?	couldn't I be banging? couldn't you be banging? couldn't he be banging? couldn't we be banging? couldn't you be banging? couldn't they be banging?
Perfect	V-ing perfect
couldn't I have banged? couldn't you have banged? couldn't he have banged? couldn't we have banged? couldn't you have banged? couldn't they have banged?	couldn't I have been banging? couldn't you have been banging? couldn't he have been banging? couldn't we have been banging? couldn't you have been banging? couldn't they have been banging?