I can underemphasize you can underemphasize she can underemphasize we can underemphasize you can underemphasize they can underemphasize
V-ing form
I can be underemphasizing you can be underemphasizing she can be underemphasizing we can be underemphasizing you can be underemphasizing they can be underemphasizing
Perfect
I can have underemphasized you can have underemphasized she can have underemphasized we can have underemphasized you can have underemphasized they can have underemphasized
V-ing perfect
I can have been underemphasizing you can have been underemphasizing she can have been underemphasizing we can have been underemphasizing you can have been underemphasizing they can have been underemphasizing
Negation
Simple form
I cannot underemphasize you cannot underemphasize she cannot underemphasize we cannot underemphasize you cannot underemphasize they cannot underemphasize
V-ing form
I cannot be underemphasizing you cannot be underemphasizing she cannot be underemphasizing we cannot be underemphasizing you cannot be underemphasizing they cannot be underemphasizing
Perfect
I cannot have underemphasized you cannot have underemphasized she cannot have underemphasized we cannot have underemphasized you cannot have underemphasized they cannot have underemphasized
V-ing perfect
I cannot have been underemphasizing you cannot have been underemphasizing she cannot have been underemphasizing we cannot have been underemphasizing you cannot have been underemphasizing they cannot have been underemphasizing
Interrogative form
Simple form
can I underemphasize? can you underemphasize? can she underemphasize? can we underemphasize? can you underemphasize? can they underemphasize?
V-ing form
can I be underemphasizing? can you be underemphasizing? can she be underemphasizing? can we be underemphasizing? can you be underemphasizing? can they be underemphasizing?
Perfect
can I have underemphasized? can you have underemphasized? can she have underemphasized? can we have underemphasized? can you have underemphasized? can they have underemphasized?
V-ing perfect
can I have been underemphasizing? can you have been underemphasizing? can she have been underemphasizing? can we have been underemphasizing? can you have been underemphasizing? can they have been underemphasizing?
Interro-negative form
Simple form
can I not underemphasize? can you not underemphasize? can she not underemphasize? can we not underemphasize? can you not underemphasize? can they not underemphasize?
V-ing form
can I not be underemphasizing? can you not be underemphasizing? can she not be underemphasizing? can we not be underemphasizing? can you not be underemphasizing? can they not be underemphasizing?
Perfect
can I not have underemphasized? can you not have underemphasized? can she not have underemphasized? can we not have underemphasized? can you not have underemphasized? can they not have underemphasized?
V-ing perfect
can I not have been underemphasizing? can you not have been underemphasizing? can she not have been underemphasizing? can we not have been underemphasizing? can you not have been underemphasizing? can they not have been underemphasizing?