I can placard you can placard he can placard we can placard you can placard they can placard
Forme en V-ing
I can be placarding you can be placarding he can be placarding we can be placarding you can be placarding they can be placarding
Perfect
I can have placarded you can have placarded he can have placarded we can have placarded you can have placarded they can have placarded
Perfect en V-ing
I can have been placarding you can have been placarding he can have been placarding we can have been placarding you can have been placarding they can have been placarding
Négation
Forme simple
I can't placard you can't placard he can't placard we can't placard you can't placard they can't placard
Forme en V-ing
I can't be placarding you can't be placarding he can't be placarding we can't be placarding you can't be placarding they can't be placarding
Perfect
I can't have placarded you can't have placarded he can't have placarded we can't have placarded you can't have placarded they can't have placarded
Perfect en V-ing
I can't have been placarding you can't have been placarding he can't have been placarding we can't have been placarding you can't have been placarding they can't have been placarding
Forme interrogative
Forme simple
can I placard? can you placard? can he placard? can we placard? can you placard? can they placard?
Forme en V-ing
can I be placarding? can you be placarding? can he be placarding? can we be placarding? can you be placarding? can they be placarding?
Perfect
can I have placarded? can you have placarded? can he have placarded? can we have placarded? can you have placarded? can they have placarded?
Perfect en V-ing
can I have been placarding? can you have been placarding? can he have been placarding? can we have been placarding? can you have been placarding? can they have been placarding?
Forme interro-négative
Forme simple
can't I placard? can't you placard? can't he placard? can't we placard? can't you placard? can't they placard?
Forme en V-ing
can't I be placarding? can't you be placarding? can't he be placarding? can't we be placarding? can't you be placarding? can't they be placarding?
Perfect
can't I have placarded? can't you have placarded? can't he have placarded? can't we have placarded? can't you have placarded? can't they have placarded?
Perfect en V-ing
can't I have been placarding? can't you have been placarding? can't he have been placarding? can't we have been placarding? can't you have been placarding? can't they have been placarding?