I could consternate you could consternate he could consternate we could consternate you could consternate they could consternate
V-ing form
I could be consternating you could be consternating he could be consternating we could be consternating you could be consternating they could be consternating
Perfect
I could have consternated you could have consternated he could have consternated we could have consternated you could have consternated they could have consternated
V-ing perfect
I could have been consternating you could have been consternating he could have been consternating we could have been consternating you could have been consternating they could have been consternating
Negation
Simple form
I could not consternate you could not consternate he could not consternate we could not consternate you could not consternate they could not consternate
V-ing form
I could not be consternating you could not be consternating he could not be consternating we could not be consternating you could not be consternating they could not be consternating
Perfect
I could not have consternated you could not have consternated he could not have consternated we could not have consternated you could not have consternated they could not have consternated
V-ing perfect
I could not have been consternating you could not have been consternating he could not have been consternating we could not have been consternating you could not have been consternating they could not have been consternating
Interrogative form
Simple form
could I consternate? could you consternate? could he consternate? could we consternate? could you consternate? could they consternate?
V-ing form
could I be consternating? could you be consternating? could he be consternating? could we be consternating? could you be consternating? could they be consternating?
Perfect
could I have consternated? could you have consternated? could he have consternated? could we have consternated? could you have consternated? could they have consternated?
V-ing perfect
could I have been consternating? could you have been consternating? could he have been consternating? could we have been consternating? could you have been consternating? could they have been consternating?
Interro-negative form
Simple form
could I not consternate? could you not consternate? could he not consternate? could we not consternate? could you not consternate? could they not consternate?
V-ing form
could I not be consternating? could you not be consternating? could he not be consternating? could we not be consternating? could you not be consternating? could they not be consternating?
Perfect
could I not have consternated? could you not have consternated? could he not have consternated? could we not have consternated? could you not have consternated? could they not have consternated?
V-ing perfect
could I not have been consternating? could you not have been consternating? could he not have been consternating? could we not have been consternating? could you not have been consternating? could they not have been consternating?