I can sulk you can sulk he can sulk we can sulk you can sulk they can sulk
V-ing form
I can be sulking you can be sulking he can be sulking we can be sulking you can be sulking they can be sulking
Perfect
I can have sulked you can have sulked he can have sulked we can have sulked you can have sulked they can have sulked
V-ing perfect
I can have been sulking you can have been sulking he can have been sulking we can have been sulking you can have been sulking they can have been sulking
Negation
Simple form
I cannot sulk you cannot sulk he cannot sulk we cannot sulk you cannot sulk they cannot sulk
V-ing form
I cannot be sulking you cannot be sulking he cannot be sulking we cannot be sulking you cannot be sulking they cannot be sulking
Perfect
I cannot have sulked you cannot have sulked he cannot have sulked we cannot have sulked you cannot have sulked they cannot have sulked
V-ing perfect
I cannot have been sulking you cannot have been sulking he cannot have been sulking we cannot have been sulking you cannot have been sulking they cannot have been sulking
Interrogative form
Simple form
can I sulk? can you sulk? can he sulk? can we sulk? can you sulk? can they sulk?
V-ing form
can I be sulking? can you be sulking? can he be sulking? can we be sulking? can you be sulking? can they be sulking?
Perfect
can I have sulked? can you have sulked? can he have sulked? can we have sulked? can you have sulked? can they have sulked?
V-ing perfect
can I have been sulking? can you have been sulking? can he have been sulking? can we have been sulking? can you have been sulking? can they have been sulking?
Interro-negative form
Simple form
can I not sulk? can you not sulk? can he not sulk? can we not sulk? can you not sulk? can they not sulk?
V-ing form
can I not be sulking? can you not be sulking? can he not be sulking? can we not be sulking? can you not be sulking? can they not be sulking?
Perfect
can I not have sulked? can you not have sulked? can he not have sulked? can we not have sulked? can you not have sulked? can they not have sulked?
V-ing perfect
can I not have been sulking? can you not have been sulking? can he not have been sulking? can we not have been sulking? can you not have been sulking? can they not have been sulking?