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