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 couldn't swim
you couldn't swim
he couldn't swim
we couldn't swim
you couldn't swim
they couldn't swim 	I couldn't be swimming
you couldn't be swimming
he couldn't be swimming
we couldn't be swimming
you couldn't be swimming
they couldn't be swimming	I couldn't have swum
you couldn't have swum
he couldn't have swum
we couldn't have swum
you couldn't have swum
they couldn't have swum	I couldn't have been swimming
you couldn't have been swimming
he couldn't have been swimming
we couldn't have been swimming
you couldn't have been swimming
they couldn't 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 	
couldn't I swim?
couldn't you swim?
couldn't he swim?
couldn't we swim?
couldn't you swim?
couldn't they swim? 	couldn't I be swimming?
couldn't you be swimming?
couldn't he be swimming?
couldn't we be swimming?
couldn't you be swimming?
couldn't they be swimming? 	couldn't I have swum?
couldn't you have swum?
couldn't he have swum?
couldn't we have swum?
couldn't you have swum?
couldn't they have swum? 	couldn't I have been swimming?
couldn't you have been swimming?
couldn't he have been swimming?
couldn't we have been swimming?
couldn't you have been swimming?
couldn't they have been swimming?