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