I can collapse you can collapse she can collapse we can collapse you can collapse they can collapse
Forma com 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
Perfeito
I can have collapsed you can have collapsed she can have collapsed we can have collapsed you can have collapsed they can have collapsed
Perfeito com 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
Negação
Forma simple
I cannot collapse you cannot collapse she cannot collapse we cannot collapse you cannot collapse they cannot collapse
Forma com 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
Perfeito
I cannot have collapsed you cannot have collapsed she cannot have collapsed we cannot have collapsed you cannot have collapsed they cannot have collapsed
Perfeito com 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
Forma interrogativa
Forma simple
can I collapse? can you collapse? can she collapse? can we collapse? can you collapse? can they collapse?
Forma com 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?
Perfeito
can I have collapsed? can you have collapsed? can she have collapsed? can we have collapsed? can you have collapsed? can they have collapsed?
Perfeito com 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?
Forma interro-Negação
Forma 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?
Forma com 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?
Perfeito
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?
Perfeito com 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?