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