I could leach you could leach he could leach we could leach you could leach they could leach
V-ing form
I could be leaching you could be leaching he could be leaching we could be leaching you could be leaching they could be leaching
Perfect
I could have leached you could have leached he could have leached we could have leached you could have leached they could have leached
V-ing perfect
I could have been leaching you could have been leaching he could have been leaching we could have been leaching you could have been leaching they could have been leaching
Negation
Simple form
I could not leach you could not leach he could not leach we could not leach you could not leach they could not leach
V-ing form
I could not be leaching you could not be leaching he could not be leaching we could not be leaching you could not be leaching they could not be leaching
Perfect
I could not have leached you could not have leached he could not have leached we could not have leached you could not have leached they could not have leached
V-ing perfect
I could not have been leaching you could not have been leaching he could not have been leaching we could not have been leaching you could not have been leaching they could not have been leaching
Interrogative form
Simple form
could I leach? could you leach? could he leach? could we leach? could you leach? could they leach?
V-ing form
could I be leaching? could you be leaching? could he be leaching? could we be leaching? could you be leaching? could they be leaching?
Perfect
could I have leached? could you have leached? could he have leached? could we have leached? could you have leached? could they have leached?
V-ing perfect
could I have been leaching? could you have been leaching? could he have been leaching? could we have been leaching? could you have been leaching? could they have been leaching?
Interro-negative form
Simple form
could I not leach? could you not leach? could he not leach? could we not leach? could you not leach? could they not leach?
V-ing form
could I not be leaching? could you not be leaching? could he not be leaching? could we not be leaching? could you not be leaching? could they not be leaching?
Perfect
could I not have leached? could you not have leached? could he not have leached? could we not have leached? could you not have leached? could they not have leached?
V-ing perfect
could I not have been leaching? could you not have been leaching? could he not have been leaching? could we not have been leaching? could you not have been leaching? could they not have been leaching?