I could agonize you could agonize she could agonize we could agonize you could agonize they could agonize
V-ing form
I could be agonizing you could be agonizing she could be agonizing we could be agonizing you could be agonizing they could be agonizing
Perfect
I could have agonized you could have agonized she could have agonized we could have agonized you could have agonized they could have agonized
V-ing perfect
I could have been agonizing you could have been agonizing she could have been agonizing we could have been agonizing you could have been agonizing they could have been agonizing
Negation
Simple form
I couldn't agonize you couldn't agonize she couldn't agonize we couldn't agonize you couldn't agonize they couldn't agonize
V-ing form
I couldn't be agonizing you couldn't be agonizing she couldn't be agonizing we couldn't be agonizing you couldn't be agonizing they couldn't be agonizing
Perfect
I couldn't have agonized you couldn't have agonized she couldn't have agonized we couldn't have agonized you couldn't have agonized they couldn't have agonized
V-ing perfect
I couldn't have been agonizing you couldn't have been agonizing she couldn't have been agonizing we couldn't have been agonizing you couldn't have been agonizing they couldn't have been agonizing
Interrogative form
Simple form
could I agonize? could you agonize? could she agonize? could we agonize? could you agonize? could they agonize?
V-ing form
could I be agonizing? could you be agonizing? could she be agonizing? could we be agonizing? could you be agonizing? could they be agonizing?
Perfect
could I have agonized? could you have agonized? could she have agonized? could we have agonized? could you have agonized? could they have agonized?
V-ing perfect
could I have been agonizing? could you have been agonizing? could she have been agonizing? could we have been agonizing? could you have been agonizing? could they have been agonizing?
Interro-negative form
Simple form
couldn't I agonize? couldn't you agonize? couldn't she agonize? couldn't we agonize? couldn't you agonize? couldn't they agonize?
V-ing form
couldn't I be agonizing? couldn't you be agonizing? couldn't she be agonizing? couldn't we be agonizing? couldn't you be agonizing? couldn't they be agonizing?
Perfect
couldn't I have agonized? couldn't you have agonized? couldn't she have agonized? couldn't we have agonized? couldn't you have agonized? couldn't they have agonized?
V-ing perfect
couldn't I have been agonizing? couldn't you have been agonizing? couldn't she have been agonizing? couldn't we have been agonizing? couldn't you have been agonizing? couldn't they have been agonizing?