I can dive you can dive he can dive we can dive you can dive they can dive
V-ing form
I can be diving you can be diving he can be diving we can be diving you can be diving they can be diving
Perfect
I can have dived you can have dived he can have dived we can have dived you can have dived they can have dived
V-ing perfect
I can have been diving you can have been diving he can have been diving we can have been diving you can have been diving they can have been diving
Negation
Simple form
I cannot dive you cannot dive he cannot dive we cannot dive you cannot dive they cannot dive
V-ing form
I cannot be diving you cannot be diving he cannot be diving we cannot be diving you cannot be diving they cannot be diving
Perfect
I cannot have dived you cannot have dived he cannot have dived we cannot have dived you cannot have dived they cannot have dived
V-ing perfect
I cannot have been diving you cannot have been diving he cannot have been diving we cannot have been diving you cannot have been diving they cannot have been diving
Interrogative form
Simple form
can I dive? can you dive? can he dive? can we dive? can you dive? can they dive?
V-ing form
can I be diving? can you be diving? can he be diving? can we be diving? can you be diving? can they be diving?
Perfect
can I have dived? can you have dived? can he have dived? can we have dived? can you have dived? can they have dived?
V-ing perfect
can I have been diving? can you have been diving? can he have been diving? can we have been diving? can you have been diving? can they have been diving?
Interro-negative form
Simple form
can I not dive? can you not dive? can he not dive? can we not dive? can you not dive? can they not dive?
V-ing form
can I not be diving? can you not be diving? can he not be diving? can we not be diving? can you not be diving? can they not be diving?
Perfect
can I not have dived? can you not have dived? can he not have dived? can we not have dived? can you not have dived? can they not have dived?
V-ing perfect
can I not have been diving? can you not have been diving? can he not have been diving? can we not have been diving? can you not have been diving? can they not have been diving?