English verb conjugation
CAN INVADE

Regular verb: invade - invaded - invaded

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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