I can slow you can slow he can slow we can slow you can slow they can slow
V-ing form
I can be slowing you can be slowing he can be slowing we can be slowing you can be slowing they can be slowing
Perfect
I can have slowed you can have slowed he can have slowed we can have slowed you can have slowed they can have slowed
V-ing perfect
I can have been slowing you can have been slowing he can have been slowing we can have been slowing you can have been slowing they can have been slowing
Negation
Simple form
I can't slow you can't slow he can't slow we can't slow you can't slow they can't slow
V-ing form
I can't be slowing you can't be slowing he can't be slowing we can't be slowing you can't be slowing they can't be slowing
Perfect
I can't have slowed you can't have slowed he can't have slowed we can't have slowed you can't have slowed they can't have slowed
V-ing perfect
I can't have been slowing you can't have been slowing he can't have been slowing we can't have been slowing you can't have been slowing they can't have been slowing
Interrogative form
Simple form
can I slow? can you slow? can he slow? can we slow? can you slow? can they slow?
V-ing form
can I be slowing? can you be slowing? can he be slowing? can we be slowing? can you be slowing? can they be slowing?
Perfect
can I have slowed? can you have slowed? can he have slowed? can we have slowed? can you have slowed? can they have slowed?
V-ing perfect
can I have been slowing? can you have been slowing? can he have been slowing? can we have been slowing? can you have been slowing? can they have been slowing?
Interro-negative form
Simple form
can't I slow? can't you slow? can't he slow? can't we slow? can't you slow? can't they slow?
V-ing form
can't I be slowing? can't you be slowing? can't he be slowing? can't we be slowing? can't you be slowing? can't they be slowing?
Perfect
can't I have slowed? can't you have slowed? can't he have slowed? can't we have slowed? can't you have slowed? can't they have slowed?
V-ing perfect
can't I have been slowing? can't you have been slowing? can't he have been slowing? can't we have been slowing? can't you have been slowing? can't they have been slowing?