I could vituperate you could vituperate she could vituperate we could vituperate you could vituperate they could vituperate
V-ing form
I could be vituperating you could be vituperating she could be vituperating we could be vituperating you could be vituperating they could be vituperating
Perfect
I could have vituperated you could have vituperated she could have vituperated we could have vituperated you could have vituperated they could have vituperated
V-ing perfect
I could have been vituperating you could have been vituperating she could have been vituperating we could have been vituperating you could have been vituperating they could have been vituperating
Negation
Simple form
I couldn't vituperate you couldn't vituperate she couldn't vituperate we couldn't vituperate you couldn't vituperate they couldn't vituperate
V-ing form
I couldn't be vituperating you couldn't be vituperating she couldn't be vituperating we couldn't be vituperating you couldn't be vituperating they couldn't be vituperating
Perfect
I couldn't have vituperated you couldn't have vituperated she couldn't have vituperated we couldn't have vituperated you couldn't have vituperated they couldn't have vituperated
V-ing perfect
I couldn't have been vituperating you couldn't have been vituperating she couldn't have been vituperating we couldn't have been vituperating you couldn't have been vituperating they couldn't have been vituperating
Interrogative form
Simple form
could I vituperate? could you vituperate? could she vituperate? could we vituperate? could you vituperate? could they vituperate?
V-ing form
could I be vituperating? could you be vituperating? could she be vituperating? could we be vituperating? could you be vituperating? could they be vituperating?
Perfect
could I have vituperated? could you have vituperated? could she have vituperated? could we have vituperated? could you have vituperated? could they have vituperated?
V-ing perfect
could I have been vituperating? could you have been vituperating? could she have been vituperating? could we have been vituperating? could you have been vituperating? could they have been vituperating?
Interro-negative form
Simple form
couldn't I vituperate? couldn't you vituperate? couldn't she vituperate? couldn't we vituperate? couldn't you vituperate? couldn't they vituperate?
V-ing form
couldn't I be vituperating? couldn't you be vituperating? couldn't she be vituperating? couldn't we be vituperating? couldn't you be vituperating? couldn't they be vituperating?
Perfect
couldn't I have vituperated? couldn't you have vituperated? couldn't she have vituperated? couldn't we have vituperated? couldn't you have vituperated? couldn't they have vituperated?
V-ing perfect
couldn't I have been vituperating? couldn't you have been vituperating? couldn't she have been vituperating? couldn't we have been vituperating? couldn't you have been vituperating? couldn't they have been vituperating?