could tricycle
Verbo regular: tricycle - tricycled- tricycled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could tricycle
you could tricycle
he could tricycle
we could tricycle
you could tricycle
they could tricycle 	I could be tricycling
you could be tricycling
he could be tricycling
we could be tricycling
you could be tricycling
they could be tricycling	I could have tricycled
you could have tricycled
he could have tricycled
we could have tricycled
you could have tricycled
they could have tricycled	I could have been tricycling
you could have been tricycling
he could have been tricycling
we could have been tricycling
you could have been tricycling
they could have been tricycling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not tricycle
you could not tricycle
he could not tricycle
we could not tricycle
you could not tricycle
they could not tricycle 	I could not be tricycling
you could not be tricycling
he could not be tricycling
we could not be tricycling
you could not be tricycling
they could not be tricycling	I could not have tricycled
you could not have tricycled
he could not have tricycled
we could not have tricycled
you could not have tricycled
they could not have tricycled	I could not have been tricycling
you could not have been tricycling
he could not have been tricycling
we could not have been tricycling
you could not have been tricycling
they could not have been tricycling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I tricycle?
could you tricycle?
could he tricycle?
could we tricycle?
could you tricycle?
could they tricycle? 	could I be tricycling?
could you be tricycling?
could he be tricycling?
could we be tricycling?
could you be tricycling?
could they be tricycling? 	could I have tricycled?
could you have tricycled?
could he have tricycled?
could we have tricycled?
could you have tricycled?
could they have tricycled? 	could I have been tricycling?
could you have been tricycling?
could he have been tricycling?
could we have been tricycling?
could you have been tricycling?
could they have been tricycling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not tricycle?
could you not tricycle?
could he not tricycle?
could we not tricycle?
could you not tricycle?
could they not tricycle? 	could I not be tricycling?
could you not be tricycling?
could he not be tricycling?
could we not be tricycling?
could you not be tricycling?
could they not be tricycling? 	could I not have tricycled?
could you not have tricycled?
could he not have tricycled?
could we not have tricycled?
could you not have tricycled?
could they not have tricycled? 	could I not have been tricycling?
could you not have been tricycling?
could he not have been tricycling?
could we not have been tricycling?
could you not have been tricycling?
could they not have been tricycling?