I could date you could date she could date we could date you could date they could date
V-ing form
I could be dating you could be dating she could be dating we could be dating you could be dating they could be dating
Perfect
I could have dated you could have dated she could have dated we could have dated you could have dated they could have dated
V-ing perfect
I could have been dating you could have been dating she could have been dating we could have been dating you could have been dating they could have been dating
Negation
Simple form
I could not date you could not date she could not date we could not date you could not date they could not date
V-ing form
I could not be dating you could not be dating she could not be dating we could not be dating you could not be dating they could not be dating
Perfect
I could not have dated you could not have dated she could not have dated we could not have dated you could not have dated they could not have dated
V-ing perfect
I could not have been dating you could not have been dating she could not have been dating we could not have been dating you could not have been dating they could not have been dating
Interrogative form
Simple form
could I date? could you date? could she date? could we date? could you date? could they date?
V-ing form
could I be dating? could you be dating? could she be dating? could we be dating? could you be dating? could they be dating?
Perfect
could I have dated? could you have dated? could she have dated? could we have dated? could you have dated? could they have dated?
V-ing perfect
could I have been dating? could you have been dating? could she have been dating? could we have been dating? could you have been dating? could they have been dating?
Interro-negative form
Simple form
could I not date? could you not date? could she not date? could we not date? could you not date? could they not date?
V-ing form
could I not be dating? could you not be dating? could she not be dating? could we not be dating? could you not be dating? could they not be dating?
Perfect
could I not have dated? could you not have dated? could she not have dated? could we not have dated? could you not have dated? could they not have dated?
V-ing perfect
could I not have been dating? could you not have been dating? could she not have been dating? could we not have been dating? could you not have been dating? could they not have been dating?