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 could not ping
you could not ping
he could not ping
we could not ping
you could not ping
they could not ping 	I could not be pinging
you could not be pinging
he could not be pinging
we could not be pinging
you could not be pinging
they could not be pinging	I could not have pinged
you could not have pinged
he could not have pinged
we could not have pinged
you could not have pinged
they could not have pinged	I could not have been pinging
you could not have been pinging
he could not have been pinging
we could not have been pinging
you could not have been pinging
they could not 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 	
could I not ping?
could you not ping?
could he not ping?
could we not ping?
could you not ping?
could they not ping? 	could I not be pinging?
could you not be pinging?
could he not be pinging?
could we not be pinging?
could you not be pinging?
could they not be pinging? 	could I not have pinged?
could you not have pinged?
could he not have pinged?
could we not have pinged?
could you not have pinged?
could they not have pinged? 	could I not have been pinging?
could you not have been pinging?
could he not have been pinging?
could we not have been pinging?
could you not have been pinging?
could they not have been pinging?