could swim
Verbo irregular: swim - swam- swum

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could swim
you could swim
he could swim
we could swim
you could swim
they could swim 	I could be swimming
you could be swimming
he could be swimming
we could be swimming
you could be swimming
they could be swimming	I could have swum
you could have swum
he could have swum
we could have swum
you could have swum
they could have swum	I could have been swimming
you could have been swimming
he could have been swimming
we could have been swimming
you could have been swimming
they could have been swimming	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not swim
you could not swim
he could not swim
we could not swim
you could not swim
they could not swim 	I could not be swimming
you could not be swimming
he could not be swimming
we could not be swimming
you could not be swimming
they could not be swimming	I could not have swum
you could not have swum
he could not have swum
we could not have swum
you could not have swum
they could not have swum	I could not have been swimming
you could not have been swimming
he could not have been swimming
we could not have been swimming
you could not have been swimming
they could not have been swimming	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I swim?
could you swim?
could he swim?
could we swim?
could you swim?
could they swim? 	could I be swimming?
could you be swimming?
could he be swimming?
could we be swimming?
could you be swimming?
could they be swimming? 	could I have swum?
could you have swum?
could he have swum?
could we have swum?
could you have swum?
could they have swum? 	could I have been swimming?
could you have been swimming?
could he have been swimming?
could we have been swimming?
could you have been swimming?
could they have been swimming? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not swim?
could you not swim?
could he not swim?
could we not swim?
could you not swim?
could they not swim? 	could I not be swimming?
could you not be swimming?
could he not be swimming?
could we not be swimming?
could you not be swimming?
could they not be swimming? 	could I not have swum?
could you not have swum?
could he not have swum?
could we not have swum?
could you not have swum?
could they not have swum? 	could I not have been swimming?
could you not have been swimming?
could he not have been swimming?
could we not have been swimming?
could you not have been swimming?
could they not have been swimming?