could joke
Verbo regular: joke - joked- joked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could joke
you could joke
he could joke
we could joke
you could joke
they could joke 	I could be joking
you could be joking
he could be joking
we could be joking
you could be joking
they could be joking	I could have joked
you could have joked
he could have joked
we could have joked
you could have joked
they could have joked	I could have been joking
you could have been joking
he could have been joking
we could have been joking
you could have been joking
they could have been joking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not joke
you could not joke
he could not joke
we could not joke
you could not joke
they could not joke 	I could not be joking
you could not be joking
he could not be joking
we could not be joking
you could not be joking
they could not be joking	I could not have joked
you could not have joked
he could not have joked
we could not have joked
you could not have joked
they could not have joked	I could not have been joking
you could not have been joking
he could not have been joking
we could not have been joking
you could not have been joking
they could not have been joking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I joke?
could you joke?
could he joke?
could we joke?
could you joke?
could they joke? 	could I be joking?
could you be joking?
could he be joking?
could we be joking?
could you be joking?
could they be joking? 	could I have joked?
could you have joked?
could he have joked?
could we have joked?
could you have joked?
could they have joked? 	could I have been joking?
could you have been joking?
could he have been joking?
could we have been joking?
could you have been joking?
could they have been joking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not joke?
could you not joke?
could he not joke?
could we not joke?
could you not joke?
could they not joke? 	could I not be joking?
could you not be joking?
could he not be joking?
could we not be joking?
could you not be joking?
could they not be joking? 	could I not have joked?
could you not have joked?
could he not have joked?
could we not have joked?
could you not have joked?
could they not have joked? 	could I not have been joking?
could you not have been joking?
could he not have been joking?
could we not have been joking?
could you not have been joking?
could they not have been joking?