I can announce you can announce he can announce we can announce you can announce they can announce
V-ing form
I can be announcing you can be announcing he can be announcing we can be announcing you can be announcing they can be announcing
Perfect
I can have announced you can have announced he can have announced we can have announced you can have announced they can have announced
V-ing perfect
I can have been announcing you can have been announcing he can have been announcing we can have been announcing you can have been announcing they can have been announcing
Negation
Simple form
I can't announce you can't announce he can't announce we can't announce you can't announce they can't announce
V-ing form
I can't be announcing you can't be announcing he can't be announcing we can't be announcing you can't be announcing they can't be announcing
Perfect
I can't have announced you can't have announced he can't have announced we can't have announced you can't have announced they can't have announced
V-ing perfect
I can't have been announcing you can't have been announcing he can't have been announcing we can't have been announcing you can't have been announcing they can't have been announcing
Interrogative form
Simple form
can I announce? can you announce? can he announce? can we announce? can you announce? can they announce?
V-ing form
can I be announcing? can you be announcing? can he be announcing? can we be announcing? can you be announcing? can they be announcing?
Perfect
can I have announced? can you have announced? can he have announced? can we have announced? can you have announced? can they have announced?
V-ing perfect
can I have been announcing? can you have been announcing? can he have been announcing? can we have been announcing? can you have been announcing? can they have been announcing?
Interro-negative form
Simple form
can't I announce? can't you announce? can't he announce? can't we announce? can't you announce? can't they announce?
V-ing form
can't I be announcing? can't you be announcing? can't he be announcing? can't we be announcing? can't you be announcing? can't they be announcing?
Perfect
can't I have announced? can't you have announced? can't he have announced? can't we have announced? can't you have announced? can't they have announced?
V-ing perfect
can't I have been announcing? can't you have been announcing? can't he have been announcing? can't we have been announcing? can't you have been announcing? can't they have been announcing?