I could slash you could slash he could slash we could slash you could slash they could slash
V-ing form
I could be slashing you could be slashing he could be slashing we could be slashing you could be slashing they could be slashing
Perfect
I could have slashed you could have slashed he could have slashed we could have slashed you could have slashed they could have slashed
V-ing perfect
I could have been slashing you could have been slashing he could have been slashing we could have been slashing you could have been slashing they could have been slashing
Negation
Simple form
I couldn't slash you couldn't slash he couldn't slash we couldn't slash you couldn't slash they couldn't slash
V-ing form
I couldn't be slashing you couldn't be slashing he couldn't be slashing we couldn't be slashing you couldn't be slashing they couldn't be slashing
Perfect
I couldn't have slashed you couldn't have slashed he couldn't have slashed we couldn't have slashed you couldn't have slashed they couldn't have slashed
V-ing perfect
I couldn't have been slashing you couldn't have been slashing he couldn't have been slashing we couldn't have been slashing you couldn't have been slashing they couldn't have been slashing
Interrogative form
Simple form
could I slash? could you slash? could he slash? could we slash? could you slash? could they slash?
V-ing form
could I be slashing? could you be slashing? could he be slashing? could we be slashing? could you be slashing? could they be slashing?
Perfect
could I have slashed? could you have slashed? could he have slashed? could we have slashed? could you have slashed? could they have slashed?
V-ing perfect
could I have been slashing? could you have been slashing? could he have been slashing? could we have been slashing? could you have been slashing? could they have been slashing?
Interro-negative form
Simple form
couldn't I slash? couldn't you slash? couldn't he slash? couldn't we slash? couldn't you slash? couldn't they slash?
V-ing form
couldn't I be slashing? couldn't you be slashing? couldn't he be slashing? couldn't we be slashing? couldn't you be slashing? couldn't they be slashing?
Perfect
couldn't I have slashed? couldn't you have slashed? couldn't he have slashed? couldn't we have slashed? couldn't you have slashed? couldn't they have slashed?
V-ing perfect
couldn't I have been slashing? couldn't you have been slashing? couldn't he have been slashing? couldn't we have been slashing? couldn't you have been slashing? couldn't they have been slashing?