I can realize you can realize he can realize we can realize you can realize they can realize
V-ing form
I can be realizing you can be realizing he can be realizing we can be realizing you can be realizing they can be realizing
Perfect
I can have realized you can have realized he can have realized we can have realized you can have realized they can have realized
V-ing perfect
I can have been realizing you can have been realizing he can have been realizing we can have been realizing you can have been realizing they can have been realizing
Negation
Simple form
I can't realize you can't realize he can't realize we can't realize you can't realize they can't realize
V-ing form
I can't be realizing you can't be realizing he can't be realizing we can't be realizing you can't be realizing they can't be realizing
Perfect
I can't have realized you can't have realized he can't have realized we can't have realized you can't have realized they can't have realized
V-ing perfect
I can't have been realizing you can't have been realizing he can't have been realizing we can't have been realizing you can't have been realizing they can't have been realizing
Interrogative form
Simple form
can I realize? can you realize? can he realize? can we realize? can you realize? can they realize?
V-ing form
can I be realizing? can you be realizing? can he be realizing? can we be realizing? can you be realizing? can they be realizing?
Perfect
can I have realized? can you have realized? can he have realized? can we have realized? can you have realized? can they have realized?
V-ing perfect
can I have been realizing? can you have been realizing? can he have been realizing? can we have been realizing? can you have been realizing? can they have been realizing?
Interro-negative form
Simple form
can't I realize? can't you realize? can't he realize? can't we realize? can't you realize? can't they realize?
V-ing form
can't I be realizing? can't you be realizing? can't he be realizing? can't we be realizing? can't you be realizing? can't they be realizing?
Perfect
can't I have realized? can't you have realized? can't he have realized? can't we have realized? can't you have realized? can't they have realized?
V-ing perfect
can't I have been realizing? can't you have been realizing? can't he have been realizing? can't we have been realizing? can't you have been realizing? can't they have been realizing?