I could exhaust you could exhaust he could exhaust we could exhaust you could exhaust they could exhaust
V-ing form
I could be exhausting you could be exhausting he could be exhausting we could be exhausting you could be exhausting they could be exhausting
Perfect
I could have exhausted you could have exhausted he could have exhausted we could have exhausted you could have exhausted they could have exhausted
V-ing perfect
I could have been exhausting you could have been exhausting he could have been exhausting we could have been exhausting you could have been exhausting they could have been exhausting
Negation
Simple form
I could not exhaust you could not exhaust he could not exhaust we could not exhaust you could not exhaust they could not exhaust
V-ing form
I could not be exhausting you could not be exhausting he could not be exhausting we could not be exhausting you could not be exhausting they could not be exhausting
Perfect
I could not have exhausted you could not have exhausted he could not have exhausted we could not have exhausted you could not have exhausted they could not have exhausted
V-ing perfect
I could not have been exhausting you could not have been exhausting he could not have been exhausting we could not have been exhausting you could not have been exhausting they could not have been exhausting
Interrogative form
Simple form
could I exhaust? could you exhaust? could he exhaust? could we exhaust? could you exhaust? could they exhaust?
V-ing form
could I be exhausting? could you be exhausting? could he be exhausting? could we be exhausting? could you be exhausting? could they be exhausting?
Perfect
could I have exhausted? could you have exhausted? could he have exhausted? could we have exhausted? could you have exhausted? could they have exhausted?
V-ing perfect
could I have been exhausting? could you have been exhausting? could he have been exhausting? could we have been exhausting? could you have been exhausting? could they have been exhausting?
Interro-negative form
Simple form
could I not exhaust? could you not exhaust? could he not exhaust? could we not exhaust? could you not exhaust? could they not exhaust?
V-ing form
could I not be exhausting? could you not be exhausting? could he not be exhausting? could we not be exhausting? could you not be exhausting? could they not be exhausting?
Perfect
could I not have exhausted? could you not have exhausted? could he not have exhausted? could we not have exhausted? could you not have exhausted? could they not have exhausted?
V-ing perfect
could I not have been exhausting? could you not have been exhausting? could he not have been exhausting? could we not have been exhausting? could you not have been exhausting? could they not have been exhausting?