could triple
Verbo regular: triple - tripled- tripled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could triple
you could triple
he could triple
we could triple
you could triple
they could triple 	I could be tripling
you could be tripling
he could be tripling
we could be tripling
you could be tripling
they could be tripling	I could have tripled
you could have tripled
he could have tripled
we could have tripled
you could have tripled
they could have tripled	I could have been tripling
you could have been tripling
he could have been tripling
we could have been tripling
you could have been tripling
they could have been tripling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not triple
you could not triple
he could not triple
we could not triple
you could not triple
they could not triple 	I could not be tripling
you could not be tripling
he could not be tripling
we could not be tripling
you could not be tripling
they could not be tripling	I could not have tripled
you could not have tripled
he could not have tripled
we could not have tripled
you could not have tripled
they could not have tripled	I could not have been tripling
you could not have been tripling
he could not have been tripling
we could not have been tripling
you could not have been tripling
they could not have been tripling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I triple?
could you triple?
could he triple?
could we triple?
could you triple?
could they triple? 	could I be tripling?
could you be tripling?
could he be tripling?
could we be tripling?
could you be tripling?
could they be tripling? 	could I have tripled?
could you have tripled?
could he have tripled?
could we have tripled?
could you have tripled?
could they have tripled? 	could I have been tripling?
could you have been tripling?
could he have been tripling?
could we have been tripling?
could you have been tripling?
could they have been tripling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not triple?
could you not triple?
could he not triple?
could we not triple?
could you not triple?
could they not triple? 	could I not be tripling?
could you not be tripling?
could he not be tripling?
could we not be tripling?
could you not be tripling?
could they not be tripling? 	could I not have tripled?
could you not have tripled?
could he not have tripled?
could we not have tripled?
could you not have tripled?
could they not have tripled? 	could I not have been tripling?
could you not have been tripling?
could he not have been tripling?
could we not have been tripling?
could you not have been tripling?
could they not have been tripling?