English verb conjugation
COULD LEASH

Regular verb: leash - leashed - leashed

Affirmation

Simple form	V-ing form
I could leash you could leash he could leash we could leash you could leash they could leash	I could be leashing you could be leashing he could be leashing we could be leashing you could be leashing they could be leashing
Perfect	V-ing perfect
I could have leashed you could have leashed he could have leashed we could have leashed you could have leashed they could have leashed	I could have been leashing you could have been leashing he could have been leashing we could have been leashing you could have been leashing they could have been leashing

Negation

Simple form	V-ing form
I could not leash you could not leash he could not leash we could not leash you could not leash they could not leash	I could not be leashing you could not be leashing he could not be leashing we could not be leashing you could not be leashing they could not be leashing
Perfect	V-ing perfect
I could not have leashed you could not have leashed he could not have leashed we could not have leashed you could not have leashed they could not have leashed	I could not have been leashing you could not have been leashing he could not have been leashing we could not have been leashing you could not have been leashing they could not have been leashing

Interrogative form

Simple form	V-ing form
could I leash? could you leash? could he leash? could we leash? could you leash? could they leash?	could I be leashing? could you be leashing? could he be leashing? could we be leashing? could you be leashing? could they be leashing?
Perfect	V-ing perfect
could I have leashed? could you have leashed? could he have leashed? could we have leashed? could you have leashed? could they have leashed?	could I have been leashing? could you have been leashing? could he have been leashing? could we have been leashing? could you have been leashing? could they have been leashing?

Interro-negative form

Simple form	V-ing form
could I not leash? could you not leash? could he not leash? could we not leash? could you not leash? could they not leash?	could I not be leashing? could you not be leashing? could he not be leashing? could we not be leashing? could you not be leashing? could they not be leashing?
Perfect	V-ing perfect
could I not have leashed? could you not have leashed? could he not have leashed? could we not have leashed? could you not have leashed? could they not have leashed?	could I not have been leashing? could you not have been leashing? could he not have been leashing? could we not have been leashing? could you not have been leashing? could they not have been leashing?