I could prospect you could prospect she could prospect we could prospect you could prospect they could prospect
V-ing form
I could be prospecting you could be prospecting she could be prospecting we could be prospecting you could be prospecting they could be prospecting
Perfect
I could have prospected you could have prospected she could have prospected we could have prospected you could have prospected they could have prospected
V-ing perfect
I could have been prospecting you could have been prospecting she could have been prospecting we could have been prospecting you could have been prospecting they could have been prospecting
Negation
Simple form
I could not prospect you could not prospect she could not prospect we could not prospect you could not prospect they could not prospect
V-ing form
I could not be prospecting you could not be prospecting she could not be prospecting we could not be prospecting you could not be prospecting they could not be prospecting
Perfect
I could not have prospected you could not have prospected she could not have prospected we could not have prospected you could not have prospected they could not have prospected
V-ing perfect
I could not have been prospecting you could not have been prospecting she could not have been prospecting we could not have been prospecting you could not have been prospecting they could not have been prospecting
Interrogative form
Simple form
could I prospect? could you prospect? could she prospect? could we prospect? could you prospect? could they prospect?
V-ing form
could I be prospecting? could you be prospecting? could she be prospecting? could we be prospecting? could you be prospecting? could they be prospecting?
Perfect
could I have prospected? could you have prospected? could she have prospected? could we have prospected? could you have prospected? could they have prospected?
V-ing perfect
could I have been prospecting? could you have been prospecting? could she have been prospecting? could we have been prospecting? could you have been prospecting? could they have been prospecting?
Interro-negative form
Simple form
could I not prospect? could you not prospect? could she not prospect? could we not prospect? could you not prospect? could they not prospect?
V-ing form
could I not be prospecting? could you not be prospecting? could she not be prospecting? could we not be prospecting? could you not be prospecting? could they not be prospecting?
Perfect
could I not have prospected? could you not have prospected? could she not have prospected? could we not have prospected? could you not have prospected? could they not have prospected?
V-ing perfect
could I not have been prospecting? could you not have been prospecting? could she not have been prospecting? could we not have been prospecting? could you not have been prospecting? could they not have been prospecting?