I can extend you can extend he can extend we can extend you can extend they can extend
Forme en V-ing
I can be extending you can be extending he can be extending we can be extending you can be extending they can be extending
Perfect
I can have extended you can have extended he can have extended we can have extended you can have extended they can have extended
Perfect en V-ing
I can have been extending you can have been extending he can have been extending we can have been extending you can have been extending they can have been extending
Négation
Forme simple
I can't extend you can't extend he can't extend we can't extend you can't extend they can't extend
Forme en V-ing
I can't be extending you can't be extending he can't be extending we can't be extending you can't be extending they can't be extending
Perfect
I can't have extended you can't have extended he can't have extended we can't have extended you can't have extended they can't have extended
Perfect en V-ing
I can't have been extending you can't have been extending he can't have been extending we can't have been extending you can't have been extending they can't have been extending
Forme interrogative
Forme simple
can I extend? can you extend? can he extend? can we extend? can you extend? can they extend?
Forme en V-ing
can I be extending? can you be extending? can he be extending? can we be extending? can you be extending? can they be extending?
Perfect
can I have extended? can you have extended? can he have extended? can we have extended? can you have extended? can they have extended?
Perfect en V-ing
can I have been extending? can you have been extending? can he have been extending? can we have been extending? can you have been extending? can they have been extending?
Forme interro-négative
Forme simple
can't I extend? can't you extend? can't he extend? can't we extend? can't you extend? can't they extend?
Forme en V-ing
can't I be extending? can't you be extending? can't he be extending? can't we be extending? can't you be extending? can't they be extending?
Perfect
can't I have extended? can't you have extended? can't he have extended? can't we have extended? can't you have extended? can't they have extended?
Perfect en V-ing
can't I have been extending? can't you have been extending? can't he have been extending? can't we have been extending? can't you have been extending? can't they have been extending?