I can pencil you can pencil he can pencil we can pencil you can pencil they can pencil
V-ing form
I can be pencilling you can be pencilling he can be pencilling we can be pencilling you can be pencilling they can be pencilling
Perfect
I can have pencilled you can have pencilled he can have pencilled we can have pencilled you can have pencilled they can have pencilled
V-ing perfect
I can have been pencilling you can have been pencilling he can have been pencilling we can have been pencilling you can have been pencilling they can have been pencilling
Negation
Simple form
I can't pencil you can't pencil he can't pencil we can't pencil you can't pencil they can't pencil
V-ing form
I can't be pencilling you can't be pencilling he can't be pencilling we can't be pencilling you can't be pencilling they can't be pencilling
Perfect
I can't have pencilled you can't have pencilled he can't have pencilled we can't have pencilled you can't have pencilled they can't have pencilled
V-ing perfect
I can't have been pencilling you can't have been pencilling he can't have been pencilling we can't have been pencilling you can't have been pencilling they can't have been pencilling
Interrogative form
Simple form
can I pencil? can you pencil? can he pencil? can we pencil? can you pencil? can they pencil?
V-ing form
can I be pencilling? can you be pencilling? can he be pencilling? can we be pencilling? can you be pencilling? can they be pencilling?
Perfect
can I have pencilled? can you have pencilled? can he have pencilled? can we have pencilled? can you have pencilled? can they have pencilled?
V-ing perfect
can I have been pencilling? can you have been pencilling? can he have been pencilling? can we have been pencilling? can you have been pencilling? can they have been pencilling?
Interro-negative form
Simple form
can't I pencil? can't you pencil? can't he pencil? can't we pencil? can't you pencil? can't they pencil?
V-ing form
can't I be pencilling? can't you be pencilling? can't he be pencilling? can't we be pencilling? can't you be pencilling? can't they be pencilling?
Perfect
can't I have pencilled? can't you have pencilled? can't he have pencilled? can't we have pencilled? can't you have pencilled? can't they have pencilled?
V-ing perfect
can't I have been pencilling? can't you have been pencilling? can't he have been pencilling? can't we have been pencilling? can't you have been pencilling? can't they have been pencilling?