English verb conjugation
COULD SCUBA-DIVE

Irregular verb: scuba-dive - scuba-dived, scuba-dove - scuba-dived

Affirmation

Simple form	V-ing form
I could scuba-dive you could scuba-dive he could scuba-dive we could scuba-dive you could scuba-dive they could scuba-dive	I could be scuba-diving you could be scuba-diving he could be scuba-diving we could be scuba-diving you could be scuba-diving they could be scuba-diving
Perfect	V-ing perfect
I could have scuba-dived you could have scuba-dived he could have scuba-dived we could have scuba-dived you could have scuba-dived they could have scuba-dived	I could have been scuba-diving you could have been scuba-diving he could have been scuba-diving we could have been scuba-diving you could have been scuba-diving they could have been scuba-diving

Negation

Simple form	V-ing form
I could not scuba-dive you could not scuba-dive he could not scuba-dive we could not scuba-dive you could not scuba-dive they could not scuba-dive	I could not be scuba-diving you could not be scuba-diving he could not be scuba-diving we could not be scuba-diving you could not be scuba-diving they could not be scuba-diving
Perfect	V-ing perfect
I could not have scuba-dived you could not have scuba-dived he could not have scuba-dived we could not have scuba-dived you could not have scuba-dived they could not have scuba-dived	I could not have been scuba-diving you could not have been scuba-diving he could not have been scuba-diving we could not have been scuba-diving you could not have been scuba-diving they could not have been scuba-diving

Interrogative form

Simple form	V-ing form
could I scuba-dive? could you scuba-dive? could he scuba-dive? could we scuba-dive? could you scuba-dive? could they scuba-dive?	could I be scuba-diving? could you be scuba-diving? could he be scuba-diving? could we be scuba-diving? could you be scuba-diving? could they be scuba-diving?
Perfect	V-ing perfect
could I have scuba-dived? could you have scuba-dived? could he have scuba-dived? could we have scuba-dived? could you have scuba-dived? could they have scuba-dived?	could I have been scuba-diving? could you have been scuba-diving? could he have been scuba-diving? could we have been scuba-diving? could you have been scuba-diving? could they have been scuba-diving?

Interro-negative form

Simple form	V-ing form
could I not scuba-dive? could you not scuba-dive? could he not scuba-dive? could we not scuba-dive? could you not scuba-dive? could they not scuba-dive?	could I not be scuba-diving? could you not be scuba-diving? could he not be scuba-diving? could we not be scuba-diving? could you not be scuba-diving? could they not be scuba-diving?
Perfect	V-ing perfect
could I not have scuba-dived? could you not have scuba-dived? could he not have scuba-dived? could we not have scuba-dived? could you not have scuba-dived? could they not have scuba-dived?	could I not have been scuba-diving? could you not have been scuba-diving? could he not have been scuba-diving? could we not have been scuba-diving? could you not have been scuba-diving? could they not have been scuba-diving?