I can catalyse you can catalyse he can catalyse we can catalyse you can catalyse they can catalyse
Forme en V-ing
I can be catalysing you can be catalysing he can be catalysing we can be catalysing you can be catalysing they can be catalysing
Perfect
I can have catalysed you can have catalysed he can have catalysed we can have catalysed you can have catalysed they can have catalysed
Perfect en V-ing
I can have been catalysing you can have been catalysing he can have been catalysing we can have been catalysing you can have been catalysing they can have been catalysing
Négation
Forme simple
I cannot catalyse you cannot catalyse he cannot catalyse we cannot catalyse you cannot catalyse they cannot catalyse
Forme en V-ing
I cannot be catalysing you cannot be catalysing he cannot be catalysing we cannot be catalysing you cannot be catalysing they cannot be catalysing
Perfect
I cannot have catalysed you cannot have catalysed he cannot have catalysed we cannot have catalysed you cannot have catalysed they cannot have catalysed
Perfect en V-ing
I cannot have been catalysing you cannot have been catalysing he cannot have been catalysing we cannot have been catalysing you cannot have been catalysing they cannot have been catalysing
Forme interrogative
Forme simple
can I catalyse? can you catalyse? can he catalyse? can we catalyse? can you catalyse? can they catalyse?
Forme en V-ing
can I be catalysing? can you be catalysing? can he be catalysing? can we be catalysing? can you be catalysing? can they be catalysing?
Perfect
can I have catalysed? can you have catalysed? can he have catalysed? can we have catalysed? can you have catalysed? can they have catalysed?
Perfect en V-ing
can I have been catalysing? can you have been catalysing? can he have been catalysing? can we have been catalysing? can you have been catalysing? can they have been catalysing?
Forme interro-négative
Forme simple
can I not catalyse? can you not catalyse? can he not catalyse? can we not catalyse? can you not catalyse? can they not catalyse?
Forme en V-ing
can I not be catalysing? can you not be catalysing? can he not be catalysing? can we not be catalysing? can you not be catalysing? can they not be catalysing?
Perfect
can I not have catalysed? can you not have catalysed? can he not have catalysed? can we not have catalysed? can you not have catalysed? can they not have catalysed?
Perfect en V-ing
can I not have been catalysing? can you not have been catalysing? can he not have been catalysing? can we not have been catalysing? can you not have been catalysing? can they not have been catalysing?