I could buggar you could buggar he could buggar we could buggar you could buggar they could buggar
V-ing form
I could be buggaring you could be buggaring he could be buggaring we could be buggaring you could be buggaring they could be buggaring
Perfect
I could have buggared you could have buggared he could have buggared we could have buggared you could have buggared they could have buggared
V-ing perfect
I could have been buggaring you could have been buggaring he could have been buggaring we could have been buggaring you could have been buggaring they could have been buggaring
Negation
Simple form
I could not buggar you could not buggar he could not buggar we could not buggar you could not buggar they could not buggar
V-ing form
I could not be buggaring you could not be buggaring he could not be buggaring we could not be buggaring you could not be buggaring they could not be buggaring
Perfect
I could not have buggared you could not have buggared he could not have buggared we could not have buggared you could not have buggared they could not have buggared
V-ing perfect
I could not have been buggaring you could not have been buggaring he could not have been buggaring we could not have been buggaring you could not have been buggaring they could not have been buggaring
Interrogative form
Simple form
could I buggar? could you buggar? could he buggar? could we buggar? could you buggar? could they buggar?
V-ing form
could I be buggaring? could you be buggaring? could he be buggaring? could we be buggaring? could you be buggaring? could they be buggaring?
Perfect
could I have buggared? could you have buggared? could he have buggared? could we have buggared? could you have buggared? could they have buggared?
V-ing perfect
could I have been buggaring? could you have been buggaring? could he have been buggaring? could we have been buggaring? could you have been buggaring? could they have been buggaring?
Interro-negative form
Simple form
could I not buggar? could you not buggar? could he not buggar? could we not buggar? could you not buggar? could they not buggar?
V-ing form
could I not be buggaring? could you not be buggaring? could he not be buggaring? could we not be buggaring? could you not be buggaring? could they not be buggaring?
Perfect
could I not have buggared? could you not have buggared? could he not have buggared? could we not have buggared? could you not have buggared? could they not have buggared?
V-ing perfect
could I not have been buggaring? could you not have been buggaring? could he not have been buggaring? could we not have been buggaring? could you not have been buggaring? could they not have been buggaring?