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