English verb conjugation
COULD RETIE

Regular verb: retie - retied - retied

Affirmation

Simple form	V-ing form
I could retie you could retie she could retie we could retie you could retie they could retie	I could be retying you could be retying she could be retying we could be retying you could be retying they could be retying
Perfect	V-ing perfect
I could have retied you could have retied she could have retied we could have retied you could have retied they could have retied	I could have been retying you could have been retying she could have been retying we could have been retying you could have been retying they could have been retying

Negation

Simple form	V-ing form
I couldn't retie you couldn't retie she couldn't retie we couldn't retie you couldn't retie they couldn't retie	I couldn't be retying you couldn't be retying she couldn't be retying we couldn't be retying you couldn't be retying they couldn't be retying
Perfect	V-ing perfect
I couldn't have retied you couldn't have retied she couldn't have retied we couldn't have retied you couldn't have retied they couldn't have retied	I couldn't have been retying you couldn't have been retying she couldn't have been retying we couldn't have been retying you couldn't have been retying they couldn't have been retying

Interrogative form

Simple form	V-ing form
could I retie? could you retie? could she retie? could we retie? could you retie? could they retie?	could I be retying? could you be retying? could she be retying? could we be retying? could you be retying? could they be retying?
Perfect	V-ing perfect
could I have retied? could you have retied? could she have retied? could we have retied? could you have retied? could they have retied?	could I have been retying? could you have been retying? could she have been retying? could we have been retying? could you have been retying? could they have been retying?

Interro-negative form

Simple form	V-ing form
couldn't I retie? couldn't you retie? couldn't she retie? couldn't we retie? couldn't you retie? couldn't they retie?	couldn't I be retying? couldn't you be retying? couldn't she be retying? couldn't we be retying? couldn't you be retying? couldn't they be retying?
Perfect	V-ing perfect
couldn't I have retied? couldn't you have retied? couldn't she have retied? couldn't we have retied? couldn't you have retied? couldn't they have retied?	couldn't I have been retying? couldn't you have been retying? couldn't she have been retying? couldn't we have been retying? couldn't you have been retying? couldn't they have been retying?