I could imagine you could imagine she could imagine we could imagine you could imagine they could imagine
V-ing form
I could be imagining you could be imagining she could be imagining we could be imagining you could be imagining they could be imagining
Perfect
I could have imagined you could have imagined she could have imagined we could have imagined you could have imagined they could have imagined
V-ing perfect
I could have been imagining you could have been imagining she could have been imagining we could have been imagining you could have been imagining they could have been imagining
Negation
Simple form
I could not imagine you could not imagine she could not imagine we could not imagine you could not imagine they could not imagine
V-ing form
I could not be imagining you could not be imagining she could not be imagining we could not be imagining you could not be imagining they could not be imagining
Perfect
I could not have imagined you could not have imagined she could not have imagined we could not have imagined you could not have imagined they could not have imagined
V-ing perfect
I could not have been imagining you could not have been imagining she could not have been imagining we could not have been imagining you could not have been imagining they could not have been imagining
Interrogative form
Simple form
could I imagine? could you imagine? could she imagine? could we imagine? could you imagine? could they imagine?
V-ing form
could I be imagining? could you be imagining? could she be imagining? could we be imagining? could you be imagining? could they be imagining?
Perfect
could I have imagined? could you have imagined? could she have imagined? could we have imagined? could you have imagined? could they have imagined?
V-ing perfect
could I have been imagining? could you have been imagining? could she have been imagining? could we have been imagining? could you have been imagining? could they have been imagining?
Interro-negative form
Simple form
could I not imagine? could you not imagine? could she not imagine? could we not imagine? could you not imagine? could they not imagine?
V-ing form
could I not be imagining? could you not be imagining? could she not be imagining? could we not be imagining? could you not be imagining? could they not be imagining?
Perfect
could I not have imagined? could you not have imagined? could she not have imagined? could we not have imagined? could you not have imagined? could they not have imagined?
V-ing perfect
could I not have been imagining? could you not have been imagining? could she not have been imagining? could we not have been imagining? could you not have been imagining? could they not have been imagining?