Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could slow slow you could slow slow he could slow slow we could slow slow you could slow slow they could slow slow
V-ing form
I could be slow slowing you could be slow slowing he could be slow slowing we could be slow slowing you could be slow slowing they could be slow slowing
Perfect
I could have slow slowed you could have slow slowed he could have slow slowed we could have slow slowed you could have slow slowed they could have slow slowed
V-ing perfect
I could have been slow slowing you could have been slow slowing he could have been slow slowing we could have been slow slowing you could have been slow slowing they could have been slow slowing
Negation
Simple form
I couldn't slow slow you couldn't slow slow he couldn't slow slow we couldn't slow slow you couldn't slow slow they couldn't slow slow
V-ing form
I couldn't be slow slowing you couldn't be slow slowing he couldn't be slow slowing we couldn't be slow slowing you couldn't be slow slowing they couldn't be slow slowing
Perfect
I couldn't have slow slowed you couldn't have slow slowed he couldn't have slow slowed we couldn't have slow slowed you couldn't have slow slowed they couldn't have slow slowed
V-ing perfect
I couldn't have been slow slowing you couldn't have been slow slowing he couldn't have been slow slowing we couldn't have been slow slowing you couldn't have been slow slowing they couldn't have been slow slowing
Interrogative form
Simple form
could I slow slow? could you slow slow? could he slow slow? could we slow slow? could you slow slow? could they slow slow?
V-ing form
could I be slow slowing? could you be slow slowing? could he be slow slowing? could we be slow slowing? could you be slow slowing? could they be slow slowing?
Perfect
could I have slow slowed? could you have slow slowed? could he have slow slowed? could we have slow slowed? could you have slow slowed? could they have slow slowed?
V-ing perfect
could I have been slow slowing? could you have been slow slowing? could he have been slow slowing? could we have been slow slowing? could you have been slow slowing? could they have been slow slowing?
Interro-negative form
Simple form
couldn't I slow slow? couldn't you slow slow? couldn't he slow slow? couldn't we slow slow? couldn't you slow slow? couldn't they slow slow?
V-ing form
couldn't I be slow slowing? couldn't you be slow slowing? couldn't he be slow slowing? couldn't we be slow slowing? couldn't you be slow slowing? couldn't they be slow slowing?
Perfect
couldn't I have slow slowed? couldn't you have slow slowed? couldn't he have slow slowed? couldn't we have slow slowed? couldn't you have slow slowed? couldn't they have slow slowed?
V-ing perfect
couldn't I have been slow slowing? couldn't you have been slow slowing? couldn't he have been slow slowing? couldn't we have been slow slowing? couldn't you have been slow slowing? couldn't they have been slow slowing?