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