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 can't invade you can't invade he can't invade we can't invade you can't invade they can't invade	I can't be invading you can't be invading he can't be invading we can't be invading you can't be invading they can't be invading
Perfect	V-ing perfect
I can't have invaded you can't have invaded he can't have invaded we can't have invaded you can't have invaded they can't have invaded	I can't have been invading you can't have been invading he can't have been invading we can't have been invading you can't have been invading they can't 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't I invade? can't you invade? can't he invade? can't we invade? can't you invade? can't they invade?	can't I be invading? can't you be invading? can't he be invading? can't we be invading? can't you be invading? can't they be invading?
Perfect	V-ing perfect
can't I have invaded? can't you have invaded? can't he have invaded? can't we have invaded? can't you have invaded? can't they have invaded?	can't I have been invading? can't you have been invading? can't he have been invading? can't we have been invading? can't you have been invading? can't they have been invading?