I could select you could select she could select we could select you could select they could select
V-ing form
I could be selecting you could be selecting she could be selecting we could be selecting you could be selecting they could be selecting
Perfect
I could have selected you could have selected she could have selected we could have selected you could have selected they could have selected
V-ing perfect
I could have been selecting you could have been selecting she could have been selecting we could have been selecting you could have been selecting they could have been selecting
Negation
Simple form
I could not select you could not select she could not select we could not select you could not select they could not select
V-ing form
I could not be selecting you could not be selecting she could not be selecting we could not be selecting you could not be selecting they could not be selecting
Perfect
I could not have selected you could not have selected she could not have selected we could not have selected you could not have selected they could not have selected
V-ing perfect
I could not have been selecting you could not have been selecting she could not have been selecting we could not have been selecting you could not have been selecting they could not have been selecting
Interrogative form
Simple form
could I select? could you select? could she select? could we select? could you select? could they select?
V-ing form
could I be selecting? could you be selecting? could she be selecting? could we be selecting? could you be selecting? could they be selecting?
Perfect
could I have selected? could you have selected? could she have selected? could we have selected? could you have selected? could they have selected?
V-ing perfect
could I have been selecting? could you have been selecting? could she have been selecting? could we have been selecting? could you have been selecting? could they have been selecting?
Interro-negative form
Simple form
could I not select? could you not select? could she not select? could we not select? could you not select? could they not select?
V-ing form
could I not be selecting? could you not be selecting? could she not be selecting? could we not be selecting? could you not be selecting? could they not be selecting?
Perfect
could I not have selected? could you not have selected? could she not have selected? could we not have selected? could you not have selected? could they not have selected?
V-ing perfect
could I not have been selecting? could you not have been selecting? could she not have been selecting? could we not have been selecting? could you not have been selecting? could they not have been selecting?