I can leach you can leach she can leach we can leach you can leach they can leach
V-ing form
I can be leaching you can be leaching she can be leaching we can be leaching you can be leaching they can be leaching
Perfect
I can have leached you can have leached she can have leached we can have leached you can have leached they can have leached
V-ing perfect
I can have been leaching you can have been leaching she can have been leaching we can have been leaching you can have been leaching they can have been leaching
Negation
Simple form
I can't leach you can't leach she can't leach we can't leach you can't leach they can't leach
V-ing form
I can't be leaching you can't be leaching she can't be leaching we can't be leaching you can't be leaching they can't be leaching
Perfect
I can't have leached you can't have leached she can't have leached we can't have leached you can't have leached they can't have leached
V-ing perfect
I can't have been leaching you can't have been leaching she can't have been leaching we can't have been leaching you can't have been leaching they can't have been leaching
Interrogative form
Simple form
can I leach? can you leach? can she leach? can we leach? can you leach? can they leach?
V-ing form
can I be leaching? can you be leaching? can she be leaching? can we be leaching? can you be leaching? can they be leaching?
Perfect
can I have leached? can you have leached? can she have leached? can we have leached? can you have leached? can they have leached?
V-ing perfect
can I have been leaching? can you have been leaching? can she have been leaching? can we have been leaching? can you have been leaching? can they have been leaching?
Interro-negative form
Simple form
can't I leach? can't you leach? can't she leach? can't we leach? can't you leach? can't they leach?
V-ing form
can't I be leaching? can't you be leaching? can't she be leaching? can't we be leaching? can't you be leaching? can't they be leaching?
Perfect
can't I have leached? can't you have leached? can't she have leached? can't we have leached? can't you have leached? can't they have leached?
V-ing perfect
can't I have been leaching? can't you have been leaching? can't she have been leaching? can't we have been leaching? can't you have been leaching? can't they have been leaching?