English verb conjugation
COULD RETORT

Regular verb: retort - retorted - retorted

Affirmation

Simple form	V-ing form
I could retort you could retort he could retort we could retort you could retort they could retort	I could be retorting you could be retorting he 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 he 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 he 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 he 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 he 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 he 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 he 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 he retort? could we retort? could you retort? could they retort?	could I be retorting? could you be retorting? could he 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 he 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 he 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 he 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 he 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 he 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 he have been retorting? couldn't we have been retorting? couldn't you have been retorting? couldn't they have been retorting?