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