English verb conjugation
COULD RETREAT

Regular verb: retreat - retreated - retreated

Affirmation

Simple form	V-ing form
I could retreat you could retreat he could retreat we could retreat you could retreat they could retreat	I could be retreating you could be retreating he could be retreating we could be retreating you could be retreating they could be retreating
Perfect	V-ing perfect
I could have retreated you could have retreated he could have retreated we could have retreated you could have retreated they could have retreated	I could have been retreating you could have been retreating he could have been retreating we could have been retreating you could have been retreating they could have been retreating

Negation

Simple form	V-ing form
I couldn't retreat you couldn't retreat he couldn't retreat we couldn't retreat you couldn't retreat they couldn't retreat	I couldn't be retreating you couldn't be retreating he couldn't be retreating we couldn't be retreating you couldn't be retreating they couldn't be retreating
Perfect	V-ing perfect
I couldn't have retreated you couldn't have retreated he couldn't have retreated we couldn't have retreated you couldn't have retreated they couldn't have retreated	I couldn't have been retreating you couldn't have been retreating he couldn't have been retreating we couldn't have been retreating you couldn't have been retreating they couldn't have been retreating

Interrogative form

Simple form	V-ing form
could I retreat? could you retreat? could he retreat? could we retreat? could you retreat? could they retreat?	could I be retreating? could you be retreating? could he be retreating? could we be retreating? could you be retreating? could they be retreating?
Perfect	V-ing perfect
could I have retreated? could you have retreated? could he have retreated? could we have retreated? could you have retreated? could they have retreated?	could I have been retreating? could you have been retreating? could he have been retreating? could we have been retreating? could you have been retreating? could they have been retreating?

Interro-negative form

Simple form	V-ing form
couldn't I retreat? couldn't you retreat? couldn't he retreat? couldn't we retreat? couldn't you retreat? couldn't they retreat?	couldn't I be retreating? couldn't you be retreating? couldn't he be retreating? couldn't we be retreating? couldn't you be retreating? couldn't they be retreating?
Perfect	V-ing perfect
couldn't I have retreated? couldn't you have retreated? couldn't he have retreated? couldn't we have retreated? couldn't you have retreated? couldn't they have retreated?	couldn't I have been retreating? couldn't you have been retreating? couldn't he have been retreating? couldn't we have been retreating? couldn't you have been retreating? couldn't they have been retreating?