could fuck
Verbo regular: fuck - fucked- fucked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could fuck
you could fuck
he could fuck
we could fuck
you could fuck
they could fuck 	I could be fucking
you could be fucking
he could be fucking
we could be fucking
you could be fucking
they could be fucking	I could have fucked
you could have fucked
he could have fucked
we could have fucked
you could have fucked
they could have fucked	I could have been fucking
you could have been fucking
he could have been fucking
we could have been fucking
you could have been fucking
they could have been fucking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't fuck
you couldn't fuck
he couldn't fuck
we couldn't fuck
you couldn't fuck
they couldn't fuck 	I couldn't be fucking
you couldn't be fucking
he couldn't be fucking
we couldn't be fucking
you couldn't be fucking
they couldn't be fucking	I couldn't have fucked
you couldn't have fucked
he couldn't have fucked
we couldn't have fucked
you couldn't have fucked
they couldn't have fucked	I couldn't have been fucking
you couldn't have been fucking
he couldn't have been fucking
we couldn't have been fucking
you couldn't have been fucking
they couldn't have been fucking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I fuck?
could you fuck?
could he fuck?
could we fuck?
could you fuck?
could they fuck? 	could I be fucking?
could you be fucking?
could he be fucking?
could we be fucking?
could you be fucking?
could they be fucking? 	could I have fucked?
could you have fucked?
could he have fucked?
could we have fucked?
could you have fucked?
could they have fucked? 	could I have been fucking?
could you have been fucking?
could he have been fucking?
could we have been fucking?
could you have been fucking?
could they have been fucking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I fuck?
couldn't you fuck?
couldn't he fuck?
couldn't we fuck?
couldn't you fuck?
couldn't they fuck? 	couldn't I be fucking?
couldn't you be fucking?
couldn't he be fucking?
couldn't we be fucking?
couldn't you be fucking?
couldn't they be fucking? 	couldn't I have fucked?
couldn't you have fucked?
couldn't he have fucked?
couldn't we have fucked?
couldn't you have fucked?
couldn't they have fucked? 	couldn't I have been fucking?
couldn't you have been fucking?
couldn't he have been fucking?
couldn't we have been fucking?
couldn't you have been fucking?
couldn't they have been fucking?