could bus
Verbo regular: bus - bussed- bussed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could bus
you could bus
he could bus
we could bus
you could bus
they could bus 	I could be bussing
you could be bussing
he could be bussing
we could be bussing
you could be bussing
they could be bussing	I could have bussed
you could have bussed
he could have bussed
we could have bussed
you could have bussed
they could have bussed	I could have been bussing
you could have been bussing
he could have been bussing
we could have been bussing
you could have been bussing
they could have been bussing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't bus
you couldn't bus
he couldn't bus
we couldn't bus
you couldn't bus
they couldn't bus 	I couldn't be bussing
you couldn't be bussing
he couldn't be bussing
we couldn't be bussing
you couldn't be bussing
they couldn't be bussing	I couldn't have bussed
you couldn't have bussed
he couldn't have bussed
we couldn't have bussed
you couldn't have bussed
they couldn't have bussed	I couldn't have been bussing
you couldn't have been bussing
he couldn't have been bussing
we couldn't have been bussing
you couldn't have been bussing
they couldn't have been bussing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I bus?
could you bus?
could he bus?
could we bus?
could you bus?
could they bus? 	could I be bussing?
could you be bussing?
could he be bussing?
could we be bussing?
could you be bussing?
could they be bussing? 	could I have bussed?
could you have bussed?
could he have bussed?
could we have bussed?
could you have bussed?
could they have bussed? 	could I have been bussing?
could you have been bussing?
could he have been bussing?
could we have been bussing?
could you have been bussing?
could they have been bussing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I bus?
couldn't you bus?
couldn't he bus?
couldn't we bus?
couldn't you bus?
couldn't they bus? 	couldn't I be bussing?
couldn't you be bussing?
couldn't he be bussing?
couldn't we be bussing?
couldn't you be bussing?
couldn't they be bussing? 	couldn't I have bussed?
couldn't you have bussed?
couldn't he have bussed?
couldn't we have bussed?
couldn't you have bussed?
couldn't they have bussed? 	couldn't I have been bussing?
couldn't you have been bussing?
couldn't he have been bussing?
couldn't we have been bussing?
couldn't you have been bussing?
couldn't they have been bussing?