I could declassify you could declassify he could declassify we could declassify you could declassify they could declassify
V-ing form
I could be declassifying you could be declassifying he could be declassifying we could be declassifying you could be declassifying they could be declassifying
Perfect
I could have declassified you could have declassified he could have declassified we could have declassified you could have declassified they could have declassified
V-ing perfect
I could have been declassifying you could have been declassifying he could have been declassifying we could have been declassifying you could have been declassifying they could have been declassifying
Negation
Simple form
I couldn't declassify you couldn't declassify he couldn't declassify we couldn't declassify you couldn't declassify they couldn't declassify
V-ing form
I couldn't be declassifying you couldn't be declassifying he couldn't be declassifying we couldn't be declassifying you couldn't be declassifying they couldn't be declassifying
Perfect
I couldn't have declassified you couldn't have declassified he couldn't have declassified we couldn't have declassified you couldn't have declassified they couldn't have declassified
V-ing perfect
I couldn't have been declassifying you couldn't have been declassifying he couldn't have been declassifying we couldn't have been declassifying you couldn't have been declassifying they couldn't have been declassifying
Interrogative form
Simple form
could I declassify? could you declassify? could he declassify? could we declassify? could you declassify? could they declassify?
V-ing form
could I be declassifying? could you be declassifying? could he be declassifying? could we be declassifying? could you be declassifying? could they be declassifying?
Perfect
could I have declassified? could you have declassified? could he have declassified? could we have declassified? could you have declassified? could they have declassified?
V-ing perfect
could I have been declassifying? could you have been declassifying? could he have been declassifying? could we have been declassifying? could you have been declassifying? could they have been declassifying?
Interro-negative form
Simple form
couldn't I declassify? couldn't you declassify? couldn't he declassify? couldn't we declassify? couldn't you declassify? couldn't they declassify?
V-ing form
couldn't I be declassifying? couldn't you be declassifying? couldn't he be declassifying? couldn't we be declassifying? couldn't you be declassifying? couldn't they be declassifying?
Perfect
couldn't I have declassified? couldn't you have declassified? couldn't he have declassified? couldn't we have declassified? couldn't you have declassified? couldn't they have declassified?
V-ing perfect
couldn't I have been declassifying? couldn't you have been declassifying? couldn't he have been declassifying? couldn't we have been declassifying? couldn't you have been declassifying? couldn't they have been declassifying?