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 couldn't joke
you couldn't joke
he couldn't joke
we couldn't joke
you couldn't joke
they couldn't joke 	I couldn't be joking
you couldn't be joking
he couldn't be joking
we couldn't be joking
you couldn't be joking
they couldn't be joking	I couldn't have joked
you couldn't have joked
he couldn't have joked
we couldn't have joked
you couldn't have joked
they couldn't have joked	I couldn't have been joking
you couldn't have been joking
he couldn't have been joking
we couldn't have been joking
you couldn't have been joking
they couldn't 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 	
couldn't I joke?
couldn't you joke?
couldn't he joke?
couldn't we joke?
couldn't you joke?
couldn't they joke? 	couldn't I be joking?
couldn't you be joking?
couldn't he be joking?
couldn't we be joking?
couldn't you be joking?
couldn't they be joking? 	couldn't I have joked?
couldn't you have joked?
couldn't he have joked?
couldn't we have joked?
couldn't you have joked?
couldn't they have joked? 	couldn't I have been joking?
couldn't you have been joking?
couldn't he have been joking?
couldn't we have been joking?
couldn't you have been joking?
couldn't they have been joking?