English verb conjugation
COULD INVADE

Regular verb: invade - invaded - invaded

Affirmation

Simple form	V-ing form
I could invade you could invade he could invade we could invade you could invade they could invade	I could be invading you could be invading he could be invading we could be invading you could be invading they could be invading
Perfect	V-ing perfect
I could have invaded you could have invaded he could have invaded we could have invaded you could have invaded they could have invaded	I could have been invading you could have been invading he could have been invading we could have been invading you could have been invading they could have been invading

Negation

Simple form	V-ing form
I could not invade you could not invade he could not invade we could not invade you could not invade they could not invade	I could not be invading you could not be invading he could not be invading we could not be invading you could not be invading they could not be invading
Perfect	V-ing perfect
I could not have invaded you could not have invaded he could not have invaded we could not have invaded you could not have invaded they could not have invaded	I could not have been invading you could not have been invading he could not have been invading we could not have been invading you could not have been invading they could not have been invading

Interrogative form

Simple form	V-ing form
could I invade? could you invade? could he invade? could we invade? could you invade? could they invade?	could I be invading? could you be invading? could he be invading? could we be invading? could you be invading? could they be invading?
Perfect	V-ing perfect
could I have invaded? could you have invaded? could he have invaded? could we have invaded? could you have invaded? could they have invaded?	could I have been invading? could you have been invading? could he have been invading? could we have been invading? could you have been invading? could they have been invading?

Interro-negative form

Simple form	V-ing form
could I not invade? could you not invade? could he not invade? could we not invade? could you not invade? could they not invade?	could I not be invading? could you not be invading? could he not be invading? could we not be invading? could you not be invading? could they not be invading?
Perfect	V-ing perfect
could I not have invaded? could you not have invaded? could he not have invaded? could we not have invaded? could you not have invaded? could they not have invaded?	could I not have been invading? could you not have been invading? could he not have been invading? could we not have been invading? could you not have been invading? could they not have been invading?