I can invade you can invade she can invade we can invade you can invade they can invade
V-ing form
I can be invading you can be invading she can be invading we can be invading you can be invading they can be invading
Perfect
I can have invaded you can have invaded she can have invaded we can have invaded you can have invaded they can have invaded
V-ing perfect
I can have been invading you can have been invading she can have been invading we can have been invading you can have been invading they can have been invading
Negation
Simple form
I can't invade you can't invade she can't invade we can't invade you can't invade they can't invade
V-ing form
I can't be invading you can't be invading she can't be invading we can't be invading you can't be invading they can't be invading
Perfect
I can't have invaded you can't have invaded she can't have invaded we can't have invaded you can't have invaded they can't have invaded
V-ing perfect
I can't have been invading you can't have been invading she 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
can I invade? can you invade? can she invade? can we invade? can you invade? can they invade?
V-ing form
can I be invading? can you be invading? can she be invading? can we be invading? can you be invading? can they be invading?
Perfect
can I have invaded? can you have invaded? can she have invaded? can we have invaded? can you have invaded? can they have invaded?
V-ing perfect
can I have been invading? can you have been invading? can she have been invading? can we have been invading? can you have been invading? can they have been invading?
Interro-negative form
Simple form
can't I invade? can't you invade? can't she invade? can't we invade? can't you invade? can't they invade?
V-ing form
can't I be invading? can't you be invading? can't she be invading? can't we be invading? can't you be invading? can't they be invading?
Perfect
can't I have invaded? can't you have invaded? can't she have invaded? can't we have invaded? can't you have invaded? can't they have invaded?
V-ing perfect
can't I have been invading? can't you have been invading? can't she have been invading? can't we have been invading? can't you have been invading? can't they have been invading?