English verb conjugation
COULD STORM

Regular verb: storm - stormed - stormed

Affirmation

Simple form	V-ing form
I could storm you could storm he could storm we could storm you could storm they could storm	I could be storming you could be storming he could be storming we could be storming you could be storming they could be storming
Perfect	V-ing perfect
I could have stormed you could have stormed he could have stormed we could have stormed you could have stormed they could have stormed	I could have been storming you could have been storming he could have been storming we could have been storming you could have been storming they could have been storming

Negation

Simple form	V-ing form
I could not storm you could not storm he could not storm we could not storm you could not storm they could not storm	I could not be storming you could not be storming he could not be storming we could not be storming you could not be storming they could not be storming
Perfect	V-ing perfect
I could not have stormed you could not have stormed he could not have stormed we could not have stormed you could not have stormed they could not have stormed	I could not have been storming you could not have been storming he could not have been storming we could not have been storming you could not have been storming they could not have been storming

Interrogative form

Simple form	V-ing form
could I storm? could you storm? could he storm? could we storm? could you storm? could they storm?	could I be storming? could you be storming? could he be storming? could we be storming? could you be storming? could they be storming?
Perfect	V-ing perfect
could I have stormed? could you have stormed? could he have stormed? could we have stormed? could you have stormed? could they have stormed?	could I have been storming? could you have been storming? could he have been storming? could we have been storming? could you have been storming? could they have been storming?

Interro-negative form

Simple form	V-ing form
could I not storm? could you not storm? could he not storm? could we not storm? could you not storm? could they not storm?	could I not be storming? could you not be storming? could he not be storming? could we not be storming? could you not be storming? could they not be storming?
Perfect	V-ing perfect
could I not have stormed? could you not have stormed? could he not have stormed? could we not have stormed? could you not have stormed? could they not have stormed?	could I not have been storming? could you not have been storming? could he not have been storming? could we not have been storming? could you not have been storming? could they not have been storming?