I can milk you can milk he can milk we can milk you can milk they can milk
V-ing form
I can be milking you can be milking he can be milking we can be milking you can be milking they can be milking
Perfect
I can have milked you can have milked he can have milked we can have milked you can have milked they can have milked
V-ing perfect
I can have been milking you can have been milking he can have been milking we can have been milking you can have been milking they can have been milking
Negation
Simple form
I cannot milk you cannot milk he cannot milk we cannot milk you cannot milk they cannot milk
V-ing form
I cannot be milking you cannot be milking he cannot be milking we cannot be milking you cannot be milking they cannot be milking
Perfect
I cannot have milked you cannot have milked he cannot have milked we cannot have milked you cannot have milked they cannot have milked
V-ing perfect
I cannot have been milking you cannot have been milking he cannot have been milking we cannot have been milking you cannot have been milking they cannot have been milking
Interrogative form
Simple form
can I milk? can you milk? can he milk? can we milk? can you milk? can they milk?
V-ing form
can I be milking? can you be milking? can he be milking? can we be milking? can you be milking? can they be milking?
Perfect
can I have milked? can you have milked? can he have milked? can we have milked? can you have milked? can they have milked?
V-ing perfect
can I have been milking? can you have been milking? can he have been milking? can we have been milking? can you have been milking? can they have been milking?
Interro-negative form
Simple form
can I not milk? can you not milk? can he not milk? can we not milk? can you not milk? can they not milk?
V-ing form
can I not be milking? can you not be milking? can he not be milking? can we not be milking? can you not be milking? can they not be milking?
Perfect
can I not have milked? can you not have milked? can he not have milked? can we not have milked? can you not have milked? can they not have milked?
V-ing perfect
can I not have been milking? can you not have been milking? can he not have been milking? can we not have been milking? can you not have been milking? can they not have been milking?