could ping
Verbo regular: ping - pinged- pinged

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could ping
you could ping
he could ping
we could ping
you could ping
they could ping 	I could be pinging
you could be pinging
he could be pinging
we could be pinging
you could be pinging
they could be pinging	I could have pinged
you could have pinged
he could have pinged
we could have pinged
you could have pinged
they could have pinged	I could have been pinging
you could have been pinging
he could have been pinging
we could have been pinging
you could have been pinging
they could have been pinging	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't ping
you couldn't ping
he couldn't ping
we couldn't ping
you couldn't ping
they couldn't ping 	I couldn't be pinging
you couldn't be pinging
he couldn't be pinging
we couldn't be pinging
you couldn't be pinging
they couldn't be pinging	I couldn't have pinged
you couldn't have pinged
he couldn't have pinged
we couldn't have pinged
you couldn't have pinged
they couldn't have pinged	I couldn't have been pinging
you couldn't have been pinging
he couldn't have been pinging
we couldn't have been pinging
you couldn't have been pinging
they couldn't have been pinging	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I ping?
could you ping?
could he ping?
could we ping?
could you ping?
could they ping? 	could I be pinging?
could you be pinging?
could he be pinging?
could we be pinging?
could you be pinging?
could they be pinging? 	could I have pinged?
could you have pinged?
could he have pinged?
could we have pinged?
could you have pinged?
could they have pinged? 	could I have been pinging?
could you have been pinging?
could he have been pinging?
could we have been pinging?
could you have been pinging?
could they have been pinging? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I ping?
couldn't you ping?
couldn't he ping?
couldn't we ping?
couldn't you ping?
couldn't they ping? 	couldn't I be pinging?
couldn't you be pinging?
couldn't he be pinging?
couldn't we be pinging?
couldn't you be pinging?
couldn't they be pinging? 	couldn't I have pinged?
couldn't you have pinged?
couldn't he have pinged?
couldn't we have pinged?
couldn't you have pinged?
couldn't they have pinged? 	couldn't I have been pinging?
couldn't you have been pinging?
couldn't he have been pinging?
couldn't we have been pinging?
couldn't you have been pinging?
couldn't they have been pinging?