I could augment you could augment he could augment we could augment you could augment they could augment
V-ing form
I could be augmenting you could be augmenting he could be augmenting we could be augmenting you could be augmenting they could be augmenting
Perfect
I could have augmented you could have augmented he could have augmented we could have augmented you could have augmented they could have augmented
V-ing perfect
I could have been augmenting you could have been augmenting he could have been augmenting we could have been augmenting you could have been augmenting they could have been augmenting
Negation
Simple form
I could not augment you could not augment he could not augment we could not augment you could not augment they could not augment
V-ing form
I could not be augmenting you could not be augmenting he could not be augmenting we could not be augmenting you could not be augmenting they could not be augmenting
Perfect
I could not have augmented you could not have augmented he could not have augmented we could not have augmented you could not have augmented they could not have augmented
V-ing perfect
I could not have been augmenting you could not have been augmenting he could not have been augmenting we could not have been augmenting you could not have been augmenting they could not have been augmenting
Interrogative form
Simple form
could I augment? could you augment? could he augment? could we augment? could you augment? could they augment?
V-ing form
could I be augmenting? could you be augmenting? could he be augmenting? could we be augmenting? could you be augmenting? could they be augmenting?
Perfect
could I have augmented? could you have augmented? could he have augmented? could we have augmented? could you have augmented? could they have augmented?
V-ing perfect
could I have been augmenting? could you have been augmenting? could he have been augmenting? could we have been augmenting? could you have been augmenting? could they have been augmenting?
Interro-negative form
Simple form
could I not augment? could you not augment? could he not augment? could we not augment? could you not augment? could they not augment?
V-ing form
could I not be augmenting? could you not be augmenting? could he not be augmenting? could we not be augmenting? could you not be augmenting? could they not be augmenting?
Perfect
could I not have augmented? could you not have augmented? could he not have augmented? could we not have augmented? could you not have augmented? could they not have augmented?
V-ing perfect
could I not have been augmenting? could you not have been augmenting? could he not have been augmenting? could we not have been augmenting? could you not have been augmenting? could they not have been augmenting?