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