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 can't milk you can't milk he can't milk we can't milk you can't milk they can't milk
V-ing form
I can't be milking you can't be milking he can't be milking we can't be milking you can't be milking they can't be milking
Perfect
I can't have milked you can't have milked he can't have milked we can't have milked you can't have milked they can't have milked
V-ing perfect
I can't have been milking you can't have been milking he can't have been milking we can't have been milking you can't have been milking they can't 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't I milk? can't you milk? can't he milk? can't we milk? can't you milk? can't they milk?
V-ing form
can't I be milking? can't you be milking? can't he be milking? can't we be milking? can't you be milking? can't they be milking?
Perfect
can't I have milked? can't you have milked? can't he have milked? can't we have milked? can't you have milked? can't they have milked?
V-ing perfect
can't I have been milking? can't you have been milking? can't he have been milking? can't we have been milking? can't you have been milking? can't they have been milking?