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