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