I can delve you can delve she can delve we can delve you can delve they can delve
V-ing form
I can be delving you can be delving she can be delving we can be delving you can be delving they can be delving
Perfect
I can have delved you can have delved she can have delved we can have delved you can have delved they can have delved
V-ing perfect
I can have been delving you can have been delving she can have been delving we can have been delving you can have been delving they can have been delving
Negation
Simple form
I can't delve you can't delve she can't delve we can't delve you can't delve they can't delve
V-ing form
I can't be delving you can't be delving she can't be delving we can't be delving you can't be delving they can't be delving
Perfect
I can't have delved you can't have delved she can't have delved we can't have delved you can't have delved they can't have delved
V-ing perfect
I can't have been delving you can't have been delving she can't have been delving we can't have been delving you can't have been delving they can't have been delving
Interrogative form
Simple form
can I delve? can you delve? can she delve? can we delve? can you delve? can they delve?
V-ing form
can I be delving? can you be delving? can she be delving? can we be delving? can you be delving? can they be delving?
Perfect
can I have delved? can you have delved? can she have delved? can we have delved? can you have delved? can they have delved?
V-ing perfect
can I have been delving? can you have been delving? can she have been delving? can we have been delving? can you have been delving? can they have been delving?
Interro-negative form
Simple form
can't I delve? can't you delve? can't she delve? can't we delve? can't you delve? can't they delve?
V-ing form
can't I be delving? can't you be delving? can't she be delving? can't we be delving? can't you be delving? can't they be delving?
Perfect
can't I have delved? can't you have delved? can't she have delved? can't we have delved? can't you have delved? can't they have delved?
V-ing perfect
can't I have been delving? can't you have been delving? can't she have been delving? can't we have been delving? can't you have been delving? can't they have been delving?