English verb conjugation
COULD DERAI

Regular verb: derai - deraied - deraied

Affirmation

Simple form	V-ing form
I could derai you could derai he could derai we could derai you could derai they could derai	I could be deraiing you could be deraiing he could be deraiing we could be deraiing you could be deraiing they could be deraiing
Perfect	V-ing perfect
I could have deraied you could have deraied he could have deraied we could have deraied you could have deraied they could have deraied	I could have been deraiing you could have been deraiing he could have been deraiing we could have been deraiing you could have been deraiing they could have been deraiing

Negation

Simple form	V-ing form
I could not derai you could not derai he could not derai we could not derai you could not derai they could not derai	I could not be deraiing you could not be deraiing he could not be deraiing we could not be deraiing you could not be deraiing they could not be deraiing
Perfect	V-ing perfect
I could not have deraied you could not have deraied he could not have deraied we could not have deraied you could not have deraied they could not have deraied	I could not have been deraiing you could not have been deraiing he could not have been deraiing we could not have been deraiing you could not have been deraiing they could not have been deraiing

Interrogative form

Simple form	V-ing form
could I derai? could you derai? could he derai? could we derai? could you derai? could they derai?	could I be deraiing? could you be deraiing? could he be deraiing? could we be deraiing? could you be deraiing? could they be deraiing?
Perfect	V-ing perfect
could I have deraied? could you have deraied? could he have deraied? could we have deraied? could you have deraied? could they have deraied?	could I have been deraiing? could you have been deraiing? could he have been deraiing? could we have been deraiing? could you have been deraiing? could they have been deraiing?

Interro-negative form

Simple form	V-ing form
could I not derai? could you not derai? could he not derai? could we not derai? could you not derai? could they not derai?	could I not be deraiing? could you not be deraiing? could he not be deraiing? could we not be deraiing? could you not be deraiing? could they not be deraiing?
Perfect	V-ing perfect
could I not have deraied? could you not have deraied? could he not have deraied? could we not have deraied? could you not have deraied? could they not have deraied?	could I not have been deraiing? could you not have been deraiing? could he not have been deraiing? could we not have been deraiing? could you not have been deraiing? could they not have been deraiing?