I could diversify you could diversify she could diversify we could diversify you could diversify they could diversify
V-ing form
I could be diversifying you could be diversifying she could be diversifying we could be diversifying you could be diversifying they could be diversifying
Perfect
I could have diversified you could have diversified she could have diversified we could have diversified you could have diversified they could have diversified
V-ing perfect
I could have been diversifying you could have been diversifying she could have been diversifying we could have been diversifying you could have been diversifying they could have been diversifying
Negation
Simple form
I couldn't diversify you couldn't diversify she couldn't diversify we couldn't diversify you couldn't diversify they couldn't diversify
V-ing form
I couldn't be diversifying you couldn't be diversifying she couldn't be diversifying we couldn't be diversifying you couldn't be diversifying they couldn't be diversifying
Perfect
I couldn't have diversified you couldn't have diversified she couldn't have diversified we couldn't have diversified you couldn't have diversified they couldn't have diversified
V-ing perfect
I couldn't have been diversifying you couldn't have been diversifying she couldn't have been diversifying we couldn't have been diversifying you couldn't have been diversifying they couldn't have been diversifying
Interrogative form
Simple form
could I diversify? could you diversify? could she diversify? could we diversify? could you diversify? could they diversify?
V-ing form
could I be diversifying? could you be diversifying? could she be diversifying? could we be diversifying? could you be diversifying? could they be diversifying?
Perfect
could I have diversified? could you have diversified? could she have diversified? could we have diversified? could you have diversified? could they have diversified?
V-ing perfect
could I have been diversifying? could you have been diversifying? could she have been diversifying? could we have been diversifying? could you have been diversifying? could they have been diversifying?
Interro-negative form
Simple form
couldn't I diversify? couldn't you diversify? couldn't she diversify? couldn't we diversify? couldn't you diversify? couldn't they diversify?
V-ing form
couldn't I be diversifying? couldn't you be diversifying? couldn't she be diversifying? couldn't we be diversifying? couldn't you be diversifying? couldn't they be diversifying?
Perfect
couldn't I have diversified? couldn't you have diversified? couldn't she have diversified? couldn't we have diversified? couldn't you have diversified? couldn't they have diversified?
V-ing perfect
couldn't I have been diversifying? couldn't you have been diversifying? couldn't she have been diversifying? couldn't we have been diversifying? couldn't you have been diversifying? couldn't they have been diversifying?