can collapse
Verbo regular: collapse - collapsed- collapsed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can collapse
you can collapse
he can collapse
we can collapse
you can collapse
they can collapse 	I can be collapsing
you can be collapsing
he can be collapsing
we can be collapsing
you can be collapsing
they can be collapsing	I can have collapsed
you can have collapsed
he can have collapsed
we can have collapsed
you can have collapsed
they can have collapsed	I can have been collapsing
you can have been collapsing
he can have been collapsing
we can have been collapsing
you can have been collapsing
they can have been collapsing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can't collapse
you can't collapse
he can't collapse
we can't collapse
you can't collapse
they can't collapse 	I can't be collapsing
you can't be collapsing
he can't be collapsing
we can't be collapsing
you can't be collapsing
they can't be collapsing	I can't have collapsed
you can't have collapsed
he can't have collapsed
we can't have collapsed
you can't have collapsed
they can't have collapsed	I can't have been collapsing
you can't have been collapsing
he can't have been collapsing
we can't have been collapsing
you can't have been collapsing
they can't have been collapsing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I collapse?
can you collapse?
can he collapse?
can we collapse?
can you collapse?
can they collapse? 	can I be collapsing?
can you be collapsing?
can he be collapsing?
can we be collapsing?
can you be collapsing?
can they be collapsing? 	can I have collapsed?
can you have collapsed?
can he have collapsed?
can we have collapsed?
can you have collapsed?
can they have collapsed? 	can I have been collapsing?
can you have been collapsing?
can he have been collapsing?
can we have been collapsing?
can you have been collapsing?
can they have been collapsing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can't I collapse?
can't you collapse?
can't he collapse?
can't we collapse?
can't you collapse?
can't they collapse? 	can't I be collapsing?
can't you be collapsing?
can't he be collapsing?
can't we be collapsing?
can't you be collapsing?
can't they be collapsing? 	can't I have collapsed?
can't you have collapsed?
can't he have collapsed?
can't we have collapsed?
can't you have collapsed?
can't they have collapsed? 	can't I have been collapsing?
can't you have been collapsing?
can't he have been collapsing?
can't we have been collapsing?
can't you have been collapsing?
can't they have been collapsing?