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