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