I can perk you can perk she can perk we can perk you can perk they can perk
Forme en V-ing
I can be perking you can be perking she can be perking we can be perking you can be perking they can be perking
Perfect
I can have perked you can have perked she can have perked we can have perked you can have perked they can have perked
Perfect en V-ing
I can have been perking you can have been perking she can have been perking we can have been perking you can have been perking they can have been perking
Négation
Forme simple
I can't perk you can't perk she can't perk we can't perk you can't perk they can't perk
Forme en V-ing
I can't be perking you can't be perking she can't be perking we can't be perking you can't be perking they can't be perking
Perfect
I can't have perked you can't have perked she can't have perked we can't have perked you can't have perked they can't have perked
Perfect en V-ing
I can't have been perking you can't have been perking she can't have been perking we can't have been perking you can't have been perking they can't have been perking
Forme interrogative
Forme simple
can I perk? can you perk? can she perk? can we perk? can you perk? can they perk?
Forme en V-ing
can I be perking? can you be perking? can she be perking? can we be perking? can you be perking? can they be perking?
Perfect
can I have perked? can you have perked? can she have perked? can we have perked? can you have perked? can they have perked?
Perfect en V-ing
can I have been perking? can you have been perking? can she have been perking? can we have been perking? can you have been perking? can they have been perking?
Forme interro-négative
Forme simple
can't I perk? can't you perk? can't she perk? can't we perk? can't you perk? can't they perk?
Forme en V-ing
can't I be perking? can't you be perking? can't she be perking? can't we be perking? can't you be perking? can't they be perking?
Perfect
can't I have perked? can't you have perked? can't she have perked? can't we have perked? can't you have perked? can't they have perked?
Perfect en V-ing
can't I have been perking? can't you have been perking? can't she have been perking? can't we have been perking? can't you have been perking? can't they have been perking?