I can underemphasize you can underemphasize he can underemphasize we can underemphasize you can underemphasize they can underemphasize
V-ing form
I can be underemphasizing you can be underemphasizing he can be underemphasizing we can be underemphasizing you can be underemphasizing they can be underemphasizing
Perfect
I can have underemphasized you can have underemphasized he 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 he can have been underemphasizing we can have been underemphasizing you can have been underemphasizing they can have been underemphasizing
Negation
Simple form
I can't underemphasize you can't underemphasize he can't underemphasize we can't underemphasize you can't underemphasize they can't underemphasize
V-ing form
I can't be underemphasizing you can't be underemphasizing he can't be underemphasizing we can't be underemphasizing you can't be underemphasizing they can't be underemphasizing
Perfect
I can't have underemphasized you can't have underemphasized he can't have underemphasized we can't have underemphasized you can't have underemphasized they can't have underemphasized
V-ing perfect
I can't have been underemphasizing you can't have been underemphasizing he can't have been underemphasizing we can't have been underemphasizing you can't have been underemphasizing they can't have been underemphasizing
Interrogative form
Simple form
can I underemphasize? can you underemphasize? can he underemphasize? can we underemphasize? can you underemphasize? can they underemphasize?
V-ing form
can I be underemphasizing? can you be underemphasizing? can he be underemphasizing? can we be underemphasizing? can you be underemphasizing? can they be underemphasizing?
Perfect
can I have underemphasized? can you have underemphasized? can he 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 he have been underemphasizing? can we have been underemphasizing? can you have been underemphasizing? can they have been underemphasizing?
Interro-negative form
Simple form
can't I underemphasize? can't you underemphasize? can't he underemphasize? can't we underemphasize? can't you underemphasize? can't they underemphasize?
V-ing form
can't I be underemphasizing? can't you be underemphasizing? can't he be underemphasizing? can't we be underemphasizing? can't you be underemphasizing? can't they be underemphasizing?
Perfect
can't I have underemphasized? can't you have underemphasized? can't he have underemphasized? can't we have underemphasized? can't you have underemphasized? can't they have underemphasized?
V-ing perfect
can't I have been underemphasizing? can't you have been underemphasizing? can't he have been underemphasizing? can't we have been underemphasizing? can't you have been underemphasizing? can't they have been underemphasizing?