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