English verb conjugation
COULD RETORT

Regular verb: retort - retorted - retorted

Affirmation

Simple form	V-ing form
I could retort you could retort she could retort we could retort you could retort they could retort	I could be retorting you could be retorting she could be retorting we could be retorting you could be retorting they could be retorting
Perfect	V-ing perfect
I could have retorted you could have retorted she could have retorted we could have retorted you could have retorted they could have retorted	I could have been retorting you could have been retorting she could have been retorting we could have been retorting you could have been retorting they could have been retorting

Negation

Simple form	V-ing form
I couldn't retort you couldn't retort she couldn't retort we couldn't retort you couldn't retort they couldn't retort	I couldn't be retorting you couldn't be retorting she couldn't be retorting we couldn't be retorting you couldn't be retorting they couldn't be retorting
Perfect	V-ing perfect
I couldn't have retorted you couldn't have retorted she couldn't have retorted we couldn't have retorted you couldn't have retorted they couldn't have retorted	I couldn't have been retorting you couldn't have been retorting she couldn't have been retorting we couldn't have been retorting you couldn't have been retorting they couldn't have been retorting

Interrogative form

Simple form	V-ing form
could I retort? could you retort? could she retort? could we retort? could you retort? could they retort?	could I be retorting? could you be retorting? could she be retorting? could we be retorting? could you be retorting? could they be retorting?
Perfect	V-ing perfect
could I have retorted? could you have retorted? could she have retorted? could we have retorted? could you have retorted? could they have retorted?	could I have been retorting? could you have been retorting? could she have been retorting? could we have been retorting? could you have been retorting? could they have been retorting?

Interro-negative form

Simple form	V-ing form
couldn't I retort? couldn't you retort? couldn't she retort? couldn't we retort? couldn't you retort? couldn't they retort?	couldn't I be retorting? couldn't you be retorting? couldn't she be retorting? couldn't we be retorting? couldn't you be retorting? couldn't they be retorting?
Perfect	V-ing perfect
couldn't I have retorted? couldn't you have retorted? couldn't she have retorted? couldn't we have retorted? couldn't you have retorted? couldn't they have retorted?	couldn't I have been retorting? couldn't you have been retorting? couldn't she have been retorting? couldn't we have been retorting? couldn't you have been retorting? couldn't they have been retorting?