I can summate you can summate he can summate we can summate you can summate they can summate
Forme en V-ing
I can be summating you can be summating he can be summating we can be summating you can be summating they can be summating
Perfect
I can have summated you can have summated he can have summated we can have summated you can have summated they can have summated
Perfect en V-ing
I can have been summating you can have been summating he can have been summating we can have been summating you can have been summating they can have been summating
Négation
Forme simple
I cannot summate you cannot summate he cannot summate we cannot summate you cannot summate they cannot summate
Forme en V-ing
I cannot be summating you cannot be summating he cannot be summating we cannot be summating you cannot be summating they cannot be summating
Perfect
I cannot have summated you cannot have summated he cannot have summated we cannot have summated you cannot have summated they cannot have summated
Perfect en V-ing
I cannot have been summating you cannot have been summating he cannot have been summating we cannot have been summating you cannot have been summating they cannot have been summating
Forme interrogative
Forme simple
can I summate? can you summate? can he summate? can we summate? can you summate? can they summate?
Forme en V-ing
can I be summating? can you be summating? can he be summating? can we be summating? can you be summating? can they be summating?
Perfect
can I have summated? can you have summated? can he have summated? can we have summated? can you have summated? can they have summated?
Perfect en V-ing
can I have been summating? can you have been summating? can he have been summating? can we have been summating? can you have been summating? can they have been summating?
Forme interro-négative
Forme simple
can I not summate? can you not summate? can he not summate? can we not summate? can you not summate? can they not summate?
Forme en V-ing
can I not be summating? can you not be summating? can he not be summating? can we not be summating? can you not be summating? can they not be summating?
Perfect
can I not have summated? can you not have summated? can he not have summated? can we not have summated? can you not have summated? can they not have summated?
Perfect en V-ing
can I not have been summating? can you not have been summating? can he not have been summating? can we not have been summating? can you not have been summating? can they not have been summating?