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