English verb conjugation
COULD PING

Regular verb: ping - pinged - pinged

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?