I can collapse you can collapse she can collapse we can collapse you can collapse they can collapse
Forme en V-ing
I can be collapsing you can be collapsing she can be collapsing we can be collapsing you can be collapsing they can be collapsing
Perfect
I can have collapsed you can have collapsed she can have collapsed we can have collapsed you can have collapsed they can have collapsed
Perfect en V-ing
I can have been collapsing you can have been collapsing she can have been collapsing we can have been collapsing you can have been collapsing they can have been collapsing
Négation
Forme simple
I cannot collapse you cannot collapse she cannot collapse we cannot collapse you cannot collapse they cannot collapse
Forme en V-ing
I cannot be collapsing you cannot be collapsing she cannot be collapsing we cannot be collapsing you cannot be collapsing they cannot be collapsing
Perfect
I cannot have collapsed you cannot have collapsed she cannot have collapsed we cannot have collapsed you cannot have collapsed they cannot have collapsed
Perfect en V-ing
I cannot have been collapsing you cannot have been collapsing she cannot have been collapsing we cannot have been collapsing you cannot have been collapsing they cannot have been collapsing
Forme interrogative
Forme simple
can I collapse? can you collapse? can she collapse? can we collapse? can you collapse? can they collapse?
Forme en V-ing
can I be collapsing? can you be collapsing? can she be collapsing? can we be collapsing? can you be collapsing? can they be collapsing?
Perfect
can I have collapsed? can you have collapsed? can she have collapsed? can we have collapsed? can you have collapsed? can they have collapsed?
Perfect en V-ing
can I have been collapsing? can you have been collapsing? can she have been collapsing? can we have been collapsing? can you have been collapsing? can they have been collapsing?
Forme interro-négative
Forme simple
can I not collapse? can you not collapse? can she not collapse? can we not collapse? can you not collapse? can they not collapse?
Forme en V-ing
can I not be collapsing? can you not be collapsing? can she not be collapsing? can we not be collapsing? can you not be collapsing? can they not be collapsing?
Perfect
can I not have collapsed? can you not have collapsed? can she not have collapsed? can we not have collapsed? can you not have collapsed? can they not have collapsed?
Perfect en V-ing
can I not have been collapsing? can you not have been collapsing? can she not have been collapsing? can we not have been collapsing? can you not have been collapsing? can they not have been collapsing?