I could explore you could explore he could explore we could explore you could explore they could explore
V-ing form
I could be exploring you could be exploring he could be exploring we could be exploring you could be exploring they could be exploring
Perfect
I could have explored you could have explored he could have explored we could have explored you could have explored they could have explored
V-ing perfect
I could have been exploring you could have been exploring he could have been exploring we could have been exploring you could have been exploring they could have been exploring
Negation
Simple form
I could not explore you could not explore he could not explore we could not explore you could not explore they could not explore
V-ing form
I could not be exploring you could not be exploring he could not be exploring we could not be exploring you could not be exploring they could not be exploring
Perfect
I could not have explored you could not have explored he could not have explored we could not have explored you could not have explored they could not have explored
V-ing perfect
I could not have been exploring you could not have been exploring he could not have been exploring we could not have been exploring you could not have been exploring they could not have been exploring
Interrogative form
Simple form
could I explore? could you explore? could he explore? could we explore? could you explore? could they explore?
V-ing form
could I be exploring? could you be exploring? could he be exploring? could we be exploring? could you be exploring? could they be exploring?
Perfect
could I have explored? could you have explored? could he have explored? could we have explored? could you have explored? could they have explored?
V-ing perfect
could I have been exploring? could you have been exploring? could he have been exploring? could we have been exploring? could you have been exploring? could they have been exploring?
Interro-negative form
Simple form
could I not explore? could you not explore? could he not explore? could we not explore? could you not explore? could they not explore?
V-ing form
could I not be exploring? could you not be exploring? could he not be exploring? could we not be exploring? could you not be exploring? could they not be exploring?
Perfect
could I not have explored? could you not have explored? could he not have explored? could we not have explored? could you not have explored? could they not have explored?
V-ing perfect
could I not have been exploring? could you not have been exploring? could he not have been exploring? could we not have been exploring? could you not have been exploring? could they not have been exploring?