I could glare you could glare he could glare we could glare you could glare they could glare
V-ing form
I could be glaring you could be glaring he could be glaring we could be glaring you could be glaring they could be glaring
Perfect
I could have glared you could have glared he could have glared we could have glared you could have glared they could have glared
V-ing perfect
I could have been glaring you could have been glaring he could have been glaring we could have been glaring you could have been glaring they could have been glaring
Negation
Simple form
I could not glare you could not glare he could not glare we could not glare you could not glare they could not glare
V-ing form
I could not be glaring you could not be glaring he could not be glaring we could not be glaring you could not be glaring they could not be glaring
Perfect
I could not have glared you could not have glared he could not have glared we could not have glared you could not have glared they could not have glared
V-ing perfect
I could not have been glaring you could not have been glaring he could not have been glaring we could not have been glaring you could not have been glaring they could not have been glaring
Interrogative form
Simple form
could I glare? could you glare? could he glare? could we glare? could you glare? could they glare?
V-ing form
could I be glaring? could you be glaring? could he be glaring? could we be glaring? could you be glaring? could they be glaring?
Perfect
could I have glared? could you have glared? could he have glared? could we have glared? could you have glared? could they have glared?
V-ing perfect
could I have been glaring? could you have been glaring? could he have been glaring? could we have been glaring? could you have been glaring? could they have been glaring?
Interro-negative form
Simple form
could I not glare? could you not glare? could he not glare? could we not glare? could you not glare? could they not glare?
V-ing form
could I not be glaring? could you not be glaring? could he not be glaring? could we not be glaring? could you not be glaring? could they not be glaring?
Perfect
could I not have glared? could you not have glared? could he not have glared? could we not have glared? could you not have glared? could they not have glared?
V-ing perfect
could I not have been glaring? could you not have been glaring? could he not have been glaring? could we not have been glaring? could you not have been glaring? could they not have been glaring?