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 couldn't select you couldn't select she couldn't select we couldn't select you couldn't select they couldn't select
V-ing form
I couldn't be selecting you couldn't be selecting she couldn't be selecting we couldn't be selecting you couldn't be selecting they couldn't be selecting
Perfect
I couldn't have selected you couldn't have selected she couldn't have selected we couldn't have selected you couldn't have selected they couldn't have selected
V-ing perfect
I couldn't have been selecting you couldn't have been selecting she couldn't have been selecting we couldn't have been selecting you couldn't have been selecting they couldn't 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
couldn't I select? couldn't you select? couldn't she select? couldn't we select? couldn't you select? couldn't they select?
V-ing form
couldn't I be selecting? couldn't you be selecting? couldn't she be selecting? couldn't we be selecting? couldn't you be selecting? couldn't they be selecting?
Perfect
couldn't I have selected? couldn't you have selected? couldn't she have selected? couldn't we have selected? couldn't you have selected? couldn't they have selected?
V-ing perfect
couldn't I have been selecting? couldn't you have been selecting? couldn't she have been selecting? couldn't we have been selecting? couldn't you have been selecting? couldn't they have been selecting?