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 cannot announce you cannot announce he cannot announce we cannot announce you cannot announce they cannot announce
V-ing form
I cannot be announcing you cannot be announcing he cannot be announcing we cannot be announcing you cannot be announcing they cannot be announcing
Perfect
I cannot have announced you cannot have announced he cannot have announced we cannot have announced you cannot have announced they cannot have announced
V-ing perfect
I cannot have been announcing you cannot have been announcing he cannot have been announcing we cannot have been announcing you cannot have been announcing they cannot 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 I not announce? can you not announce? can he not announce? can we not announce? can you not announce? can they not announce?
V-ing form
can I not be announcing? can you not be announcing? can he not be announcing? can we not be announcing? can you not be announcing? can they not be announcing?
Perfect
can I not have announced? can you not have announced? can he not have announced? can we not have announced? can you not have announced? can they not have announced?
V-ing perfect
can I not have been announcing? can you not have been announcing? can he not have been announcing? can we not have been announcing? can you not have been announcing? can they not have been announcing?