could bug
Verbo regular: bug - bugged- bugged

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could bug
you could bug
she could bug
we could bug
you could bug
they could bug 	I could be bugging
you could be bugging
she could be bugging
we could be bugging
you could be bugging
they could be bugging	I could have bugged
you could have bugged
she could have bugged
we could have bugged
you could have bugged
they could have bugged	I could have been bugging
you could have been bugging
she could have been bugging
we could have been bugging
you could have been bugging
they could have been bugging	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't bug
you couldn't bug
she couldn't bug
we couldn't bug
you couldn't bug
they couldn't bug 	I couldn't be bugging
you couldn't be bugging
she couldn't be bugging
we couldn't be bugging
you couldn't be bugging
they couldn't be bugging	I couldn't have bugged
you couldn't have bugged
she couldn't have bugged
we couldn't have bugged
you couldn't have bugged
they couldn't have bugged	I couldn't have been bugging
you couldn't have been bugging
she couldn't have been bugging
we couldn't have been bugging
you couldn't have been bugging
they couldn't have been bugging	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I bug?
could you bug?
could she bug?
could we bug?
could you bug?
could they bug? 	could I be bugging?
could you be bugging?
could she be bugging?
could we be bugging?
could you be bugging?
could they be bugging? 	could I have bugged?
could you have bugged?
could she have bugged?
could we have bugged?
could you have bugged?
could they have bugged? 	could I have been bugging?
could you have been bugging?
could she have been bugging?
could we have been bugging?
could you have been bugging?
could they have been bugging? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I bug?
couldn't you bug?
couldn't she bug?
couldn't we bug?
couldn't you bug?
couldn't they bug? 	couldn't I be bugging?
couldn't you be bugging?
couldn't she be bugging?
couldn't we be bugging?
couldn't you be bugging?
couldn't they be bugging? 	couldn't I have bugged?
couldn't you have bugged?
couldn't she have bugged?
couldn't we have bugged?
couldn't you have bugged?
couldn't they have bugged? 	couldn't I have been bugging?
couldn't you have been bugging?
couldn't she have been bugging?
couldn't we have been bugging?
couldn't you have been bugging?
couldn't they have been bugging?