I can sough you can sough he can sough we can sough you can sough they can sough
V-ing form
I can be soughing you can be soughing he can be soughing we can be soughing you can be soughing they can be soughing
Perfect
I can have soughed you can have soughed he can have soughed we can have soughed you can have soughed they can have soughed
V-ing perfect
I can have been soughing you can have been soughing he can have been soughing we can have been soughing you can have been soughing they can have been soughing
Negation
Simple form
I cannot sough you cannot sough he cannot sough we cannot sough you cannot sough they cannot sough
V-ing form
I cannot be soughing you cannot be soughing he cannot be soughing we cannot be soughing you cannot be soughing they cannot be soughing
Perfect
I cannot have soughed you cannot have soughed he cannot have soughed we cannot have soughed you cannot have soughed they cannot have soughed
V-ing perfect
I cannot have been soughing you cannot have been soughing he cannot have been soughing we cannot have been soughing you cannot have been soughing they cannot have been soughing
Interrogative form
Simple form
can I sough? can you sough? can he sough? can we sough? can you sough? can they sough?
V-ing form
can I be soughing? can you be soughing? can he be soughing? can we be soughing? can you be soughing? can they be soughing?
Perfect
can I have soughed? can you have soughed? can he have soughed? can we have soughed? can you have soughed? can they have soughed?
V-ing perfect
can I have been soughing? can you have been soughing? can he have been soughing? can we have been soughing? can you have been soughing? can they have been soughing?
Interro-negative form
Simple form
can I not sough? can you not sough? can he not sough? can we not sough? can you not sough? can they not sough?
V-ing form
can I not be soughing? can you not be soughing? can he not be soughing? can we not be soughing? can you not be soughing? can they not be soughing?
Perfect
can I not have soughed? can you not have soughed? can he not have soughed? can we not have soughed? can you not have soughed? can they not have soughed?
V-ing perfect
can I not have been soughing? can you not have been soughing? can he not have been soughing? can we not have been soughing? can you not have been soughing? can they not have been soughing?