I could slash you could slash she could slash we could slash you could slash they could slash
V-ing form
I could be slashing you could be slashing she could be slashing we could be slashing you could be slashing they could be slashing
Perfect
I could have slashed you could have slashed she 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 she 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 she 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 she 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 she 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 she 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 she slash? could we slash? could you slash? could they slash?
V-ing form
could I be slashing? could you be slashing? could she be slashing? could we be slashing? could you be slashing? could they be slashing?
Perfect
could I have slashed? could you have slashed? could she 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 she 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 she 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 she 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 she 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 she have been slashing? couldn't we have been slashing? couldn't you have been slashing? couldn't they have been slashing?