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