Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could weep weep you could weep weep she could weep weep we could weep weep you could weep weep they could weep weep
V-ing form
I could be weep weeping you could be weep weeping she could be weep weeping we could be weep weeping you could be weep weeping they could be weep weeping
Perfect
I could have weep weeped you could have weep weeped she could have weep weeped we could have weep weeped you could have weep weeped they could have weep weeped
V-ing perfect
I could have been weep weeping you could have been weep weeping she could have been weep weeping we could have been weep weeping you could have been weep weeping they could have been weep weeping
Negation
Simple form
I couldn't weep weep you couldn't weep weep she couldn't weep weep we couldn't weep weep you couldn't weep weep they couldn't weep weep
V-ing form
I couldn't be weep weeping you couldn't be weep weeping she couldn't be weep weeping we couldn't be weep weeping you couldn't be weep weeping they couldn't be weep weeping
Perfect
I couldn't have weep weeped you couldn't have weep weeped she couldn't have weep weeped we couldn't have weep weeped you couldn't have weep weeped they couldn't have weep weeped
V-ing perfect
I couldn't have been weep weeping you couldn't have been weep weeping she couldn't have been weep weeping we couldn't have been weep weeping you couldn't have been weep weeping they couldn't have been weep weeping
Interrogative form
Simple form
could I weep weep? could you weep weep? could she weep weep? could we weep weep? could you weep weep? could they weep weep?
V-ing form
could I be weep weeping? could you be weep weeping? could she be weep weeping? could we be weep weeping? could you be weep weeping? could they be weep weeping?
Perfect
could I have weep weeped? could you have weep weeped? could she have weep weeped? could we have weep weeped? could you have weep weeped? could they have weep weeped?
V-ing perfect
could I have been weep weeping? could you have been weep weeping? could she have been weep weeping? could we have been weep weeping? could you have been weep weeping? could they have been weep weeping?
Interro-negative form
Simple form
couldn't I weep weep? couldn't you weep weep? couldn't she weep weep? couldn't we weep weep? couldn't you weep weep? couldn't they weep weep?
V-ing form
couldn't I be weep weeping? couldn't you be weep weeping? couldn't she be weep weeping? couldn't we be weep weeping? couldn't you be weep weeping? couldn't they be weep weeping?
Perfect
couldn't I have weep weeped? couldn't you have weep weeped? couldn't she have weep weeped? couldn't we have weep weeped? couldn't you have weep weeped? couldn't they have weep weeped?
V-ing perfect
couldn't I have been weep weeping? couldn't you have been weep weeping? couldn't she have been weep weeping? couldn't we have been weep weeping? couldn't you have been weep weeping? couldn't they have been weep weeping?