I can mix you can mix he can mix we can mix you can mix they can mix
V-ing form
I can be mixing you can be mixing he can be mixing we can be mixing you can be mixing they can be mixing
Perfect
I can have mixed you can have mixed he can have mixed we can have mixed you can have mixed they can have mixed
V-ing perfect
I can have been mixing you can have been mixing he can have been mixing we can have been mixing you can have been mixing they can have been mixing
Negation
Simple form
I cannot mix you cannot mix he cannot mix we cannot mix you cannot mix they cannot mix
V-ing form
I cannot be mixing you cannot be mixing he cannot be mixing we cannot be mixing you cannot be mixing they cannot be mixing
Perfect
I cannot have mixed you cannot have mixed he cannot have mixed we cannot have mixed you cannot have mixed they cannot have mixed
V-ing perfect
I cannot have been mixing you cannot have been mixing he cannot have been mixing we cannot have been mixing you cannot have been mixing they cannot have been mixing
Interrogative form
Simple form
can I mix? can you mix? can he mix? can we mix? can you mix? can they mix?
V-ing form
can I be mixing? can you be mixing? can he be mixing? can we be mixing? can you be mixing? can they be mixing?
Perfect
can I have mixed? can you have mixed? can he have mixed? can we have mixed? can you have mixed? can they have mixed?
V-ing perfect
can I have been mixing? can you have been mixing? can he have been mixing? can we have been mixing? can you have been mixing? can they have been mixing?
Interro-negative form
Simple form
can I not mix? can you not mix? can he not mix? can we not mix? can you not mix? can they not mix?
V-ing form
can I not be mixing? can you not be mixing? can he not be mixing? can we not be mixing? can you not be mixing? can they not be mixing?
Perfect
can I not have mixed? can you not have mixed? can he not have mixed? can we not have mixed? can you not have mixed? can they not have mixed?
V-ing perfect
can I not have been mixing? can you not have been mixing? can he not have been mixing? can we not have been mixing? can you not have been mixing? can they not have been mixing?