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