I could date you could date he could date we could date you could date they could date
V-ing form
I could be dating you could be dating he could be dating we could be dating you could be dating they could be dating
Perfect
I could have dated you could have dated he 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 he could have been dating we could have been dating you could have been dating they could have been dating
Negation
Simple form
I couldn't date you couldn't date he couldn't date we couldn't date you couldn't date they couldn't date
V-ing form
I couldn't be dating you couldn't be dating he couldn't be dating we couldn't be dating you couldn't be dating they couldn't be dating
Perfect
I couldn't have dated you couldn't have dated he couldn't have dated we couldn't have dated you couldn't have dated they couldn't have dated
V-ing perfect
I couldn't have been dating you couldn't have been dating he couldn't have been dating we couldn't have been dating you couldn't have been dating they couldn't have been dating
Interrogative form
Simple form
could I date? could you date? could he date? could we date? could you date? could they date?
V-ing form
could I be dating? could you be dating? could he be dating? could we be dating? could you be dating? could they be dating?
Perfect
could I have dated? could you have dated? could he 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 he have been dating? could we have been dating? could you have been dating? could they have been dating?
Interro-negative form
Simple form
couldn't I date? couldn't you date? couldn't he date? couldn't we date? couldn't you date? couldn't they date?
V-ing form
couldn't I be dating? couldn't you be dating? couldn't he be dating? couldn't we be dating? couldn't you be dating? couldn't they be dating?
Perfect
couldn't I have dated? couldn't you have dated? couldn't he have dated? couldn't we have dated? couldn't you have dated? couldn't they have dated?
V-ing perfect
couldn't I have been dating? couldn't you have been dating? couldn't he have been dating? couldn't we have been dating? couldn't you have been dating? couldn't they have been dating?