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