I can whisper you can whisper he can whisper we can whisper you can whisper they can whisper
V-ing form
I can be whispering you can be whispering he can be whispering we can be whispering you can be whispering they can be whispering
Perfect
I can have whispered you can have whispered he can have whispered we can have whispered you can have whispered they can have whispered
V-ing perfect
I can have been whispering you can have been whispering he can have been whispering we can have been whispering you can have been whispering they can have been whispering
Negation
Simple form
I can't whisper you can't whisper he can't whisper we can't whisper you can't whisper they can't whisper
V-ing form
I can't be whispering you can't be whispering he can't be whispering we can't be whispering you can't be whispering they can't be whispering
Perfect
I can't have whispered you can't have whispered he can't have whispered we can't have whispered you can't have whispered they can't have whispered
V-ing perfect
I can't have been whispering you can't have been whispering he can't have been whispering we can't have been whispering you can't have been whispering they can't have been whispering
Interrogative form
Simple form
can I whisper? can you whisper? can he whisper? can we whisper? can you whisper? can they whisper?
V-ing form
can I be whispering? can you be whispering? can he be whispering? can we be whispering? can you be whispering? can they be whispering?
Perfect
can I have whispered? can you have whispered? can he have whispered? can we have whispered? can you have whispered? can they have whispered?
V-ing perfect
can I have been whispering? can you have been whispering? can he have been whispering? can we have been whispering? can you have been whispering? can they have been whispering?
Interro-negative form
Simple form
can't I whisper? can't you whisper? can't he whisper? can't we whisper? can't you whisper? can't they whisper?
V-ing form
can't I be whispering? can't you be whispering? can't he be whispering? can't we be whispering? can't you be whispering? can't they be whispering?
Perfect
can't I have whispered? can't you have whispered? can't he have whispered? can't we have whispered? can't you have whispered? can't they have whispered?
V-ing perfect
can't I have been whispering? can't you have been whispering? can't he have been whispering? can't we have been whispering? can't you have been whispering? can't they have been whispering?