I could interpose you could interpose he could interpose we could interpose you could interpose they could interpose
V-ing form
I could be interposing you could be interposing he could be interposing we could be interposing you could be interposing they could be interposing
Perfect
I could have interposed you could have interposed he could have interposed we could have interposed you could have interposed they could have interposed
V-ing perfect
I could have been interposing you could have been interposing he could have been interposing we could have been interposing you could have been interposing they could have been interposing
Negation
Simple form
I could not interpose you could not interpose he could not interpose we could not interpose you could not interpose they could not interpose
V-ing form
I could not be interposing you could not be interposing he could not be interposing we could not be interposing you could not be interposing they could not be interposing
Perfect
I could not have interposed you could not have interposed he could not have interposed we could not have interposed you could not have interposed they could not have interposed
V-ing perfect
I could not have been interposing you could not have been interposing he could not have been interposing we could not have been interposing you could not have been interposing they could not have been interposing
Interrogative form
Simple form
could I interpose? could you interpose? could he interpose? could we interpose? could you interpose? could they interpose?
V-ing form
could I be interposing? could you be interposing? could he be interposing? could we be interposing? could you be interposing? could they be interposing?
Perfect
could I have interposed? could you have interposed? could he have interposed? could we have interposed? could you have interposed? could they have interposed?
V-ing perfect
could I have been interposing? could you have been interposing? could he have been interposing? could we have been interposing? could you have been interposing? could they have been interposing?
Interro-negative form
Simple form
could I not interpose? could you not interpose? could he not interpose? could we not interpose? could you not interpose? could they not interpose?
V-ing form
could I not be interposing? could you not be interposing? could he not be interposing? could we not be interposing? could you not be interposing? could they not be interposing?
Perfect
could I not have interposed? could you not have interposed? could he not have interposed? could we not have interposed? could you not have interposed? could they not have interposed?
V-ing perfect
could I not have been interposing? could you not have been interposing? could he not have been interposing? could we not have been interposing? could you not have been interposing? could they not have been interposing?