English verb conjugation
COULD DERAI

Regular verb: derai - deraied - deraied

Affirmation

Simple form	V-ing form
I could derai you could derai she could derai we could derai you could derai they could derai	I could be deraiing you could be deraiing she 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 she 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 she 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 couldn't derai you couldn't derai she couldn't derai we couldn't derai you couldn't derai they couldn't derai	I couldn't be deraiing you couldn't be deraiing she couldn't be deraiing we couldn't be deraiing you couldn't be deraiing they couldn't be deraiing
Perfect	V-ing perfect
I couldn't have deraied you couldn't have deraied she couldn't have deraied we couldn't have deraied you couldn't have deraied they couldn't have deraied	I couldn't have been deraiing you couldn't have been deraiing she couldn't have been deraiing we couldn't have been deraiing you couldn't have been deraiing they couldn't have been deraiing

Interrogative form

Simple form	V-ing form
could I derai? could you derai? could she derai? could we derai? could you derai? could they derai?	could I be deraiing? could you be deraiing? could she 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 she 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 she 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
couldn't I derai? couldn't you derai? couldn't she derai? couldn't we derai? couldn't you derai? couldn't they derai?	couldn't I be deraiing? couldn't you be deraiing? couldn't she be deraiing? couldn't we be deraiing? couldn't you be deraiing? couldn't they be deraiing?
Perfect	V-ing perfect
couldn't I have deraied? couldn't you have deraied? couldn't she have deraied? couldn't we have deraied? couldn't you have deraied? couldn't they have deraied?	couldn't I have been deraiing? couldn't you have been deraiing? couldn't she have been deraiing? couldn't we have been deraiing? couldn't you have been deraiing? couldn't they have been deraiing?