could bog
Verbo regular: bog - bogged- bogged

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could bog
you could bog
he could bog
we could bog
you could bog
they could bog 	I could be bogging
you could be bogging
he could be bogging
we could be bogging
you could be bogging
they could be bogging	I could have bogged
you could have bogged
he could have bogged
we could have bogged
you could have bogged
they could have bogged	I could have been bogging
you could have been bogging
he could have been bogging
we could have been bogging
you could have been bogging
they could have been bogging	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't bog
you couldn't bog
he couldn't bog
we couldn't bog
you couldn't bog
they couldn't bog 	I couldn't be bogging
you couldn't be bogging
he couldn't be bogging
we couldn't be bogging
you couldn't be bogging
they couldn't be bogging	I couldn't have bogged
you couldn't have bogged
he couldn't have bogged
we couldn't have bogged
you couldn't have bogged
they couldn't have bogged	I couldn't have been bogging
you couldn't have been bogging
he couldn't have been bogging
we couldn't have been bogging
you couldn't have been bogging
they couldn't have been bogging	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I bog?
could you bog?
could he bog?
could we bog?
could you bog?
could they bog? 	could I be bogging?
could you be bogging?
could he be bogging?
could we be bogging?
could you be bogging?
could they be bogging? 	could I have bogged?
could you have bogged?
could he have bogged?
could we have bogged?
could you have bogged?
could they have bogged? 	could I have been bogging?
could you have been bogging?
could he have been bogging?
could we have been bogging?
could you have been bogging?
could they have been bogging? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I bog?
couldn't you bog?
couldn't he bog?
couldn't we bog?
couldn't you bog?
couldn't they bog? 	couldn't I be bogging?
couldn't you be bogging?
couldn't he be bogging?
couldn't we be bogging?
couldn't you be bogging?
couldn't they be bogging? 	couldn't I have bogged?
couldn't you have bogged?
couldn't he have bogged?
couldn't we have bogged?
couldn't you have bogged?
couldn't they have bogged? 	couldn't I have been bogging?
couldn't you have been bogging?
couldn't he have been bogging?
couldn't we have been bogging?
couldn't you have been bogging?
couldn't they have been bogging?