I can ignore you can ignore he can ignore we can ignore you can ignore they can ignore
V-ing form
I can be ignoring you can be ignoring he can be ignoring we can be ignoring you can be ignoring they can be ignoring
Perfect
I can have ignored you can have ignored he can have ignored we can have ignored you can have ignored they can have ignored
V-ing perfect
I can have been ignoring you can have been ignoring he can have been ignoring we can have been ignoring you can have been ignoring they can have been ignoring
Negation
Simple form
I can't ignore you can't ignore he can't ignore we can't ignore you can't ignore they can't ignore
V-ing form
I can't be ignoring you can't be ignoring he can't be ignoring we can't be ignoring you can't be ignoring they can't be ignoring
Perfect
I can't have ignored you can't have ignored he can't have ignored we can't have ignored you can't have ignored they can't have ignored
V-ing perfect
I can't have been ignoring you can't have been ignoring he can't have been ignoring we can't have been ignoring you can't have been ignoring they can't have been ignoring
Interrogative form
Simple form
can I ignore? can you ignore? can he ignore? can we ignore? can you ignore? can they ignore?
V-ing form
can I be ignoring? can you be ignoring? can he be ignoring? can we be ignoring? can you be ignoring? can they be ignoring?
Perfect
can I have ignored? can you have ignored? can he have ignored? can we have ignored? can you have ignored? can they have ignored?
V-ing perfect
can I have been ignoring? can you have been ignoring? can he have been ignoring? can we have been ignoring? can you have been ignoring? can they have been ignoring?
Interro-negative form
Simple form
can't I ignore? can't you ignore? can't he ignore? can't we ignore? can't you ignore? can't they ignore?
V-ing form
can't I be ignoring? can't you be ignoring? can't he be ignoring? can't we be ignoring? can't you be ignoring? can't they be ignoring?
Perfect
can't I have ignored? can't you have ignored? can't he have ignored? can't we have ignored? can't you have ignored? can't they have ignored?
V-ing perfect
can't I have been ignoring? can't you have been ignoring? can't he have been ignoring? can't we have been ignoring? can't you have been ignoring? can't they have been ignoring?