I could delve you could delve he could delve we could delve you could delve they could delve
Forme en V-ing
I could be delving you could be delving he could be delving we could be delving you could be delving they could be delving
Perfect
I could have delved you could have delved he could have delved we could have delved you could have delved they could have delved
Perfect en V-ing
I could have been delving you could have been delving he could have been delving we could have been delving you could have been delving they could have been delving
Négation
Forme simple
I couldn't delve you couldn't delve he couldn't delve we couldn't delve you couldn't delve they couldn't delve
Forme en V-ing
I couldn't be delving you couldn't be delving he couldn't be delving we couldn't be delving you couldn't be delving they couldn't be delving
Perfect
I couldn't have delved you couldn't have delved he couldn't have delved we couldn't have delved you couldn't have delved they couldn't have delved
Perfect en V-ing
I couldn't have been delving you couldn't have been delving he couldn't have been delving we couldn't have been delving you couldn't have been delving they couldn't have been delving
Forme interrogative
Forme simple
could I delve? could you delve? could he delve? could we delve? could you delve? could they delve?
Forme en V-ing
could I be delving? could you be delving? could he be delving? could we be delving? could you be delving? could they be delving?
Perfect
could I have delved? could you have delved? could he have delved? could we have delved? could you have delved? could they have delved?
Perfect en V-ing
could I have been delving? could you have been delving? could he have been delving? could we have been delving? could you have been delving? could they have been delving?
Forme interro-négative
Forme simple
couldn't I delve? couldn't you delve? couldn't he delve? couldn't we delve? couldn't you delve? couldn't they delve?
Forme en V-ing
couldn't I be delving? couldn't you be delving? couldn't he be delving? couldn't we be delving? couldn't you be delving? couldn't they be delving?
Perfect
couldn't I have delved? couldn't you have delved? couldn't he have delved? couldn't we have delved? couldn't you have delved? couldn't they have delved?
Perfect en V-ing
couldn't I have been delving? couldn't you have been delving? couldn't he have been delving? couldn't we have been delving? couldn't you have been delving? couldn't they have been delving?