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