I can moo you can moo he can moo we can moo you can moo they can moo
V-ing form
I can be mooing you can be mooing he can be mooing we can be mooing you can be mooing they can be mooing
Perfect
I can have mooed you can have mooed he can have mooed we can have mooed you can have mooed they can have mooed
V-ing perfect
I can have been mooing you can have been mooing he can have been mooing we can have been mooing you can have been mooing they can have been mooing
Negation
Simple form
I cannot moo you cannot moo he cannot moo we cannot moo you cannot moo they cannot moo
V-ing form
I cannot be mooing you cannot be mooing he cannot be mooing we cannot be mooing you cannot be mooing they cannot be mooing
Perfect
I cannot have mooed you cannot have mooed he cannot have mooed we cannot have mooed you cannot have mooed they cannot have mooed
V-ing perfect
I cannot have been mooing you cannot have been mooing he cannot have been mooing we cannot have been mooing you cannot have been mooing they cannot have been mooing
Interrogative form
Simple form
can I moo? can you moo? can he moo? can we moo? can you moo? can they moo?
V-ing form
can I be mooing? can you be mooing? can he be mooing? can we be mooing? can you be mooing? can they be mooing?
Perfect
can I have mooed? can you have mooed? can he have mooed? can we have mooed? can you have mooed? can they have mooed?
V-ing perfect
can I have been mooing? can you have been mooing? can he have been mooing? can we have been mooing? can you have been mooing? can they have been mooing?
Interro-negative form
Simple form
can I not moo? can you not moo? can he not moo? can we not moo? can you not moo? can they not moo?
V-ing form
can I not be mooing? can you not be mooing? can he not be mooing? can we not be mooing? can you not be mooing? can they not be mooing?
Perfect
can I not have mooed? can you not have mooed? can he not have mooed? can we not have mooed? can you not have mooed? can they not have mooed?
V-ing perfect
can I not have been mooing? can you not have been mooing? can he not have been mooing? can we not have been mooing? can you not have been mooing? can they not have been mooing?